72164678 has 8 divisors (see below), whose sum is σ = 108543072. Its totient is φ = 35983656.

The previous prime is 72164669. The next prime is 72164681. The reversal of 72164678 is 87646127.

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

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, 48425 + ... + 49892.

It is an arithmetic number, because the mean of its divisors is an integer number (13567884).

Almost surely, 2^72164678 is an apocalyptic number.

72164678 is a deficient number, since it is larger than the sum of its proper divisors (36378394).

72164678 is a wasteful number, since it uses less digits than its factorization.

72164678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98686.

The product of its digits is 112896, while the sum is 41.

The square root of 72164678 is about 8494.9795761968. The cubic root of 72164678 is about 416.3336935180. Note that the first 3 decimals are identical.

The spelling of 72164678 in words is "seventy-two million, one hundred sixty-four thousand, six hundred seventy-eight".