72666599 has 2 divisors, whose sum is σ = 72666600. Its totient is φ = 72666598.

The previous prime is 72666569. The next prime is 72666647. The reversal of 72666599 is 99566627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72666599 - 2¹⁶ = 72601063 is a prime.

It is a super-2 number, since 2×72666599² = 10560869220453602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72666569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36333299 + 36333300.

It is an arithmetic number, because the mean of its divisors is an integer number (36333300).

Almost surely, 2^72666599 is an apocalyptic number.

72666599 is a deficient number, since it is larger than the sum of its proper divisors (1).

72666599 is an equidigital number, since it uses as much as digits as its factorization.

72666599 is an odious number, because the sum of its binary digits is odd.

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

The square root of 72666599 is about 8524.4705993979. The cubic root of 72666599 is about 417.2966947327.

The spelling of 72666599 in words is "seventy-two million, six hundred sixty-six thousand, five hundred ninety-nine".