72706165 has 8 divisors (see below), whose sum is σ = 99711360. Its totient is φ = 49855632.

The previous prime is 72706159. The next prime is 72706171. The reversal of 72706165 is 56160727.

It is an interprime number because it is at equal distance from previous prime (72706159) and next prime (72706171).

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 72706165 - 2³ = 72706157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72706165.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038625 + ... + 1038694.

It is an arithmetic number, because the mean of its divisors is an integer number (12463920).

Almost surely, 2^72706165 is an apocalyptic number.

It is an amenable number.

72706165 is a deficient number, since it is larger than the sum of its proper divisors (27005195).

72706165 is a wasteful number, since it uses less digits than its factorization.

72706165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077331.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 72706165 is about 8526.7910142093. The cubic root of 72706165 is about 417.3724184973.

The spelling of 72706165 in words is "seventy-two million, seven hundred six thousand, one hundred sixty-five".