72669994657 has 8 divisors (see below), whose sum is σ = 78381713984. Its totient is φ = 66975663888.

The previous prime is 72669994619. The next prime is 72669994669. The reversal of 72669994657 is 75649996627.

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 72669994657 - 2¹¹ = 72669992609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72669994157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4338453 + ... + 4355170.

It is an arithmetic number, because the mean of its divisors is an integer number (9797714248).

Almost surely, 2^72669994657 is an apocalyptic number.

It is an amenable number.

72669994657 is a deficient number, since it is larger than the sum of its proper divisors (5711719327).

72669994657 is a wasteful number, since it uses less digits than its factorization.

72669994657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8694279.

The product of its digits is 308629440, while the sum is 70.

The spelling of 72669994657 in words is "seventy-two billion, six hundred sixty-nine million, nine hundred ninety-four thousand, six hundred fifty-seven".