15666160331 has 16 divisors (see below), whose sum is σ = 16794208224. Its totient is φ = 14561992704.

The previous prime is 15666160327. The next prime is 15666160337. The reversal of 15666160331 is 13306166651.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 15666160331 - 2² = 15666160327 is a prime.

It is a super-2 number, since 2×15666160331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15666160337) 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, 529235 + ... + 558051.

It is an arithmetic number, because the mean of its divisors is an integer number (1049638014).

Almost surely, 2^15666160331 is an apocalyptic number.

15666160331 is a deficient number, since it is larger than the sum of its proper divisors (1128047893).

15666160331 is a wasteful number, since it uses less digits than its factorization.

15666160331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29230.

The product of its (nonzero) digits is 58320, while the sum is 38.

The spelling of 15666160331 in words is "fifteen billion, six hundred sixty-six million, one hundred sixty thousand, three hundred thirty-one".