72656699 has 2 divisors, whose sum is σ = 72656700. Its totient is φ = 72656698.

The previous prime is 72656677. The next prime is 72656711. The reversal of 72656699 is 99665627.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72656699 - 2¹⁶ = 72591163 is a prime.

It is not a weakly prime, because it can be changed into another prime (72656659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36328349 + 36328350.

It is an arithmetic number, because the mean of its divisors is an integer number (36328350).

Almost surely, 2^72656699 is an apocalyptic number.

72656699 is a deficient number, since it is larger than the sum of its proper divisors (1).

72656699 is an equidigital number, since it uses as much as digits as its factorization.

72656699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 50.

The square root of 72656699 is about 8523.8898983973. The cubic root of 72656699 is about 417.2777432247.

The spelling of 72656699 in words is "seventy-two million, six hundred fifty-six thousand, six hundred ninety-nine".