2661217552 has 40 divisors (see below), whose sum is σ = 5903193600. Its totient is φ = 1138490112.

The previous prime is 2661217543. The next prime is 2661217591. The reversal of 2661217552 is 2557121662.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42849 + ... + 84607.

It is an arithmetic number, because the mean of its divisors is an integer number (147579840).

Almost surely, 2^2661217552 is an apocalyptic number.

It is an amenable number.

2661217552 is an abundant number, since it is smaller than the sum of its proper divisors (3241976048).

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

2661217552 is a wasteful number, since it uses less digits than its factorization.

2661217552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42343 (or 42337 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 2661217552 is about 51586.9901428645. The cubic root of 2661217552 is about 1385.7773533265. Note that the first 3 decimals are identical.

The spelling of 2661217552 in words is "two billion, six hundred sixty-one million, two hundred seventeen thousand, five hundred fifty-two".