72668771 has 8 divisors (see below), whose sum is σ = 83121504. Its totient is φ = 62233920.

The previous prime is 72668759. The next prime is 72668797. The reversal of 72668771 is 17786627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72668771 - 2²⁶ = 5559907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72664771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5831 + ... + 13391.

It is an arithmetic number, because the mean of its divisors is an integer number (10390188).

Almost surely, 2^72668771 is an apocalyptic number.

72668771 is a deficient number, since it is larger than the sum of its proper divisors (10452733).

72668771 is a wasteful number, since it uses less digits than its factorization.

72668771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8941.

The product of its digits is 197568, while the sum is 44.

The square root of 72668771 is about 8524.5979963867. The cubic root of 72668771 is about 417.3008523485.

The spelling of 72668771 in words is "seventy-two million, six hundred sixty-eight thousand, seven hundred seventy-one".