72616686 has 8 divisors (see below), whose sum is σ = 145233384. Its totient is φ = 24205560.

The previous prime is 72616679. The next prime is 72616693. The reversal of 72616686 is 68661627.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72616679) and next prime (72616693).

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

72616686 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6051385 + ... + 6051396.

It is an arithmetic number, because the mean of its divisors is an integer number (18154173).

Almost surely, 2^72616686 is an apocalyptic number.

72616686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72616686 is a wasteful number, since it uses less digits than its factorization.

72616686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12102786.

The product of its digits is 145152, while the sum is 42.

The square root of 72616686 is about 8521.5424660093. The cubic root of 72616686 is about 417.2011290446.

The spelling of 72616686 in words is "seventy-two million, six hundred sixteen thousand, six hundred eighty-six".