165716665930 has 8 divisors (see below), whose sum is σ = 298289998692. Its totient is φ = 66286666368.

The previous prime is 165716665897. The next prime is 165716665937. The reversal of 165716665930 is 39566617561.

165716665930 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 163952917921 + 1763748009 = 404911^2 + 41997^2 .

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

It is not an unprimeable number, because it can be changed into a prime (165716665937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8285833287 + ... + 8285833306.

Almost surely, 2^165716665930 is an apocalyptic number.

165716665930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165716665930 is a deficient number, since it is larger than the sum of its proper divisors (132573332762).

165716665930 is a wasteful number, since it uses less digits than its factorization.

165716665930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16571666600.

The product of its (nonzero) digits is 6123600, while the sum is 55.

The spelling of 165716665930 in words is "one hundred sixty-five billion, seven hundred sixteen million, six hundred sixty-five thousand, nine hundred thirty".