16612532665 has 8 divisors (see below), whose sum is σ = 19936842120. Its totient is φ = 13288824192.

The previous prime is 16612532609. The next prime is 16612532687. The reversal of 16612532665 is 56623521661.

It can be written as a sum of positive squares in 4 ways, for example, as 5832071424 + 10780461241 = 76368^2 + 103829^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16612532665 - 2²³ = 16604144057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87010 + ... + 201979.

It is an arithmetic number, because the mean of its divisors is an integer number (2492105265).

Almost surely, 2^16612532665 is an apocalyptic number.

It is an amenable number.

16612532665 is a deficient number, since it is larger than the sum of its proper divisors (3324309455).

16612532665 is a wasteful number, since it uses less digits than its factorization.

16612532665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300491.

The product of its digits is 388800, while the sum is 43.

The spelling of 16612532665 in words is "sixteen billion, six hundred twelve million, five hundred thirty-two thousand, six hundred sixty-five".