2669121540 has 144 divisors (see below), whose sum is σ = 8493069312. Its totient is φ = 677714688.

The previous prime is 2669121509. The next prime is 2669121593. The reversal of 2669121540 is 451219662.

2669121540 is a `hidden beast` number, since 2 + 6 + 6 + 91 + 21 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2669121495 and 2669121504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 308757 + ... + 317283.

It is an arithmetic number, because the mean of its divisors is an integer number (58979648).

Almost surely, 2^2669121540 is an apocalyptic number.

2669121540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2669121540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4246534656).

2669121540 is an abundant number, since it is smaller than the sum of its proper divisors (5823947772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2669121540 is a wasteful number, since it uses less digits than its factorization.

2669121540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8626 (or 8621 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 2669121540 is about 51663.5416904416. The cubic root of 2669121540 is about 1387.1479467164.

The spelling of 2669121540 in words is "two billion, six hundred sixty-nine million, one hundred twenty-one thousand, five hundred forty".