72866747 has 2 divisors, whose sum is σ = 72866748. Its totient is φ = 72866746.

The previous prime is 72866723. The next prime is 72866791. The reversal of 72866747 is 74766827.

It is a weak prime.

It is an emirp because it is prime and its reverse (74766827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72866747 - 2⁸ = 72866491 is a prime.

It is not a weakly prime, because it can be changed into another prime (72866707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36433373 + 36433374.

It is an arithmetic number, because the mean of its divisors is an integer number (36433374).

Almost surely, 2^72866747 is an apocalyptic number.

72866747 is a deficient number, since it is larger than the sum of its proper divisors (1).

72866747 is an equidigital number, since it uses as much as digits as its factorization.

72866747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 47.

The square root of 72866747 is about 8536.2021414678. The cubic root of 72866747 is about 417.6794681825.

The spelling of 72866747 in words is "seventy-two million, eight hundred sixty-six thousand, seven hundred forty-seven".