72765566 has 8 divisors (see below), whose sum is σ = 110150040. Its totient is φ = 36048888.

The previous prime is 72765547. The next prime is 72765577. The reversal of 72765566 is 66556727.

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

It is a super-3 number, since 3×72765566³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 166676 + ... + 167111.

It is an arithmetic number, because the mean of its divisors is an integer number (13768755).

Almost surely, 2^72765566 is an apocalyptic number.

72765566 is a deficient number, since it is larger than the sum of its proper divisors (37384474).

72765566 is a wasteful number, since it uses less digits than its factorization.

72765566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333898.

The product of its digits is 529200, while the sum is 44.

The square root of 72765566 is about 8530.2735008908. The cubic root of 72765566 is about 417.4860520996.

The spelling of 72765566 in words is "seventy-two million, seven hundred sixty-five thousand, five hundred sixty-six".