165716667051 has 32 divisors (see below), whose sum is σ = 247600281600. Its totient is φ = 97926451584.

The previous prime is 165716667013. The next prime is 165716667059. The reversal of 165716667051 is 150766617561.

It is not a de Polignac number, because 165716667051 - 2⁹ = 165716666539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165716666985 and 165716667003.

It is not an unprimeable number, because it can be changed into a prime (165716667059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 755751 + ... + 950048.

It is an arithmetic number, because the mean of its divisors is an integer number (7737508800).

Almost surely, 2^165716667051 is an apocalyptic number.

165716667051 is a deficient number, since it is larger than the sum of its proper divisors (81883614549).

165716667051 is a wasteful number, since it uses less digits than its factorization.

165716667051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705915.

The product of its (nonzero) digits is 1587600, while the sum is 51.

The spelling of 165716667051 in words is "one hundred sixty-five billion, seven hundred sixteen million, six hundred sixty-seven thousand, fifty-one".