2149666560 has 144 divisors (see below), whose sum is σ = 7628453280. Its totient is φ = 573235200.

The previous prime is 2149666559. The next prime is 2149666577. The reversal of 2149666560 is 656669412.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3460 + ... + 65660.

It is an arithmetic number, because the mean of its divisors is an integer number (52975370).

Almost surely, 2^2149666560 is an apocalyptic number.

2149666560 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 2149666560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3814226640).

2149666560 is an abundant number, since it is smaller than the sum of its proper divisors (5478786720).

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

2149666560 is an equidigital number, since it uses as much as digits as its factorization.

2149666560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62231 (or 62211 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 2149666560 is about 46364.4967620700. The cubic root of 2149666560 is about 1290.5961549561.

The spelling of 2149666560 in words is "two billion, one hundred forty-nine million, six hundred sixty-six thousand, five hundred sixty".