6615025881 has 16 divisors (see below), whose sum is σ = 8930525184. Its totient is φ = 4354822544.

The previous prime is 6615025847. The next prime is 6615025927. The reversal of 6615025881 is 1885205166.

It is a cyclic number.

It is not a de Polignac number, because 6615025881 - 2⁶ = 6615025817 is a prime.

It is a super-2 number, since 2×6615025881² = 87517134812599652322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6615025381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664120 + ... + 674006.

It is an arithmetic number, because the mean of its divisors is an integer number (558157824).

Almost surely, 2^6615025881 is an apocalyptic number.

It is an amenable number.

6615025881 is a deficient number, since it is larger than the sum of its proper divisors (2315499303).

6615025881 is a wasteful number, since it uses less digits than its factorization.

6615025881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12660.

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 6615025881 is about 81332.8093760445. The cubic root of 6615025881 is about 1877.1998718602.

The spelling of 6615025881 in words is "six billion, six hundred fifteen million, twenty-five thousand, eight hundred eighty-one".