72766657 has 8 divisors (see below), whose sum is σ = 73422720. Its totient is φ = 72114000.

The previous prime is 72766651. The next prime is 72766697. The reversal of 72766657 is 75666727.

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 72766657 - 2³ = 72766649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72766651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59383 + ... + 60595.

It is an arithmetic number, because the mean of its divisors is an integer number (9177840).

Almost surely, 2^72766657 is an apocalyptic number.

It is an amenable number.

72766657 is a deficient number, since it is larger than the sum of its proper divisors (656063).

72766657 is a wasteful number, since it uses less digits than its factorization.

72766657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703.

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

The square root of 72766657 is about 8530.3374493627. The cubic root of 72766657 is about 417.4881385947.

The spelling of 72766657 in words is "seventy-two million, seven hundred sixty-six thousand, six hundred fifty-seven".