72766516 has 12 divisors (see below), whose sum is σ = 127638532. Its totient is φ = 36298368.

The previous prime is 72766501. The next prime is 72766537. The reversal of 72766516 is 61566727.

It is a happy number.

72766516 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 29811600 + 42954916 = 5460^2 + 6554^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19275 + ... + 22738.

Almost surely, 2^72766516 is an apocalyptic number.

It is an amenable number.

72766516 is a deficient number, since it is larger than the sum of its proper divisors (54872016).

72766516 is a wasteful number, since it uses less digits than its factorization.

72766516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42450 (or 42448 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 72766516 is about 8530.3291847384. The cubic root of 72766516 is about 417.4878689389.

The spelling of 72766516 in words is "seventy-two million, seven hundred sixty-six thousand, five hundred sixteen".