72660167999 has 2 divisors, whose sum is σ = 72660168000. Its totient is φ = 72660167998.

The previous prime is 72660167981. The next prime is 72660168029. The reversal of 72660167999 is 99976106627.

It is a weak prime.

It is an emirp because it is prime and its reverse (99976106627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72660167999 - 2³² = 68365200703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72660167939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36330083999 + 36330084000.

It is an arithmetic number, because the mean of its divisors is an integer number (36330084000).

Almost surely, 2^72660167999 is an apocalyptic number.

72660167999 is a deficient number, since it is larger than the sum of its proper divisors (1).

72660167999 is an equidigital number, since it uses as much as digits as its factorization.

72660167999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15431472, while the sum is 62.

The spelling of 72660167999 in words is "seventy-two billion, six hundred sixty million, one hundred sixty-seven thousand, nine hundred ninety-nine".