15662625661 has 8 divisors (see below), whose sum is σ = 16545237920. Its totient is φ = 14785839792.

The previous prime is 15662625637. The next prime is 15662625683. The reversal of 15662625661 is 16652626651.

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 15662625661 - 2³³ = 7072691069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15662625611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1451070 + ... + 1461823.

It is an arithmetic number, because the mean of its divisors is an integer number (2068154740).

Almost surely, 2^15662625661 is an apocalyptic number.

It is an amenable number.

15662625661 is a deficient number, since it is larger than the sum of its proper divisors (882612259).

15662625661 is a wasteful number, since it uses less digits than its factorization.

15662625661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2913195.

The product of its digits is 777600, while the sum is 46.

The spelling of 15662625661 in words is "fifteen billion, six hundred sixty-two million, six hundred twenty-five thousand, six hundred sixty-one".