72645166 has 16 divisors (see below), whose sum is σ = 120890880. Its totient is φ = 32460280.

The previous prime is 72645091. The next prime is 72645187. The reversal of 72645166 is 66154627.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 26686 + ... + 29281.

It is an arithmetic number, because the mean of its divisors is an integer number (7555680).

Almost surely, 2^72645166 is an apocalyptic number.

72645166 is a deficient number, since it is larger than the sum of its proper divisors (48245714).

72645166 is a wasteful number, since it uses less digits than its factorization.

72645166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56039.

The product of its digits is 60480, while the sum is 37.

The square root of 72645166 is about 8523.2133611684. The cubic root of 72645166 is about 417.2556635040.

The spelling of 72645166 in words is "seventy-two million, six hundred forty-five thousand, one hundred sixty-six".