72665677 has 12 divisors (see below), whose sum is σ = 87445980. Its totient is φ = 60135936.

The previous prime is 72665647. The next prime is 72665699. The reversal of 72665677 is 77656627.

It can be written as a sum of positive squares in 2 ways, for example, as 54848836 + 17816841 = 7406^2 + 4221^2 .

It is not a de Polignac number, because 72665677 - 2²³ = 64277069 is a prime.

It is a super-2 number, since 2×72665677² = 10560601227736658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72665647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24148 + ... + 26989.

It is an arithmetic number, because the mean of its divisors is an integer number (7287165).

Almost surely, 2^72665677 is an apocalyptic number.

It is an amenable number.

72665677 is a deficient number, since it is larger than the sum of its proper divisors (14780303).

72665677 is a wasteful number, since it uses less digits than its factorization.

72665677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51180 (or 51173 counting only the distinct ones).

The product of its digits is 740880, while the sum is 46.

The square root of 72665677 is about 8524.4165196217. The cubic root of 72665677 is about 417.2949298266.

The spelling of 72665677 in words is "seventy-two million, six hundred sixty-five thousand, six hundred seventy-seven".