72662910065 has 4 divisors (see below), whose sum is σ = 87195492084. Its totient is φ = 58130328048.

The previous prime is 72662910043. The next prime is 72662910077. The reversal of 72662910065 is 56001926627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56001926627 = 209213 ⋅267679.

It can be written as a sum of positive squares in 2 ways, for example, as 27776555569 + 44886354496 = 166663^2 + 211864^2 .

It is a cyclic number.

It is not a de Polignac number, because 72662910065 - 2²² = 72658715761 is a prime.

It is a super-2 number, since 2×72662910065² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72662909998 and 72662910025.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7266291002 + ... + 7266291011.

It is an arithmetic number, because the mean of its divisors is an integer number (21798873021).

Almost surely, 2^72662910065 is an apocalyptic number.

It is an amenable number.

72662910065 is a deficient number, since it is larger than the sum of its proper divisors (14532582019).

72662910065 is a wasteful number, since it uses less digits than its factorization.

72662910065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14532582018.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 72662910065 in words is "seventy-two billion, six hundred sixty-two million, nine hundred ten thousand, sixty-five".