164707665 has 16 divisors (see below), whose sum is σ = 263957568. Its totient is φ = 87702336.

The previous prime is 164707663. The next prime is 164707703. The reversal of 164707665 is 566707461.

164707665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 164707665 - 2¹ = 164707663 is a prime.

It is a super-2 number, since 2×164707665² = 54257229819504450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164707663) 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, 1107 + ... + 18183.

It is an arithmetic number, because the mean of its divisors is an integer number (16497348).

Almost surely, 2^164707665 is an apocalyptic number.

164707665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164707665 is a deficient number, since it is larger than the sum of its proper divisors (99249903).

164707665 is a wasteful number, since it uses less digits than its factorization.

164707665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17728.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 164707665 is about 12833.8484095769. The cubic root of 164707665 is about 548.1565443773.

The spelling of 164707665 in words is "one hundred sixty-four million, seven hundred seven thousand, six hundred sixty-five".