72166012 has 12 divisors (see below), whose sum is σ = 126369936. Its totient is φ = 36060320.

The previous prime is 72165991. The next prime is 72166051. The reversal of 72166012 is 21066127.

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, 2937 + ... + 12367.

It is an arithmetic number, because the mean of its divisors is an integer number (10530828).

Almost surely, 2^72166012 is an apocalyptic number.

It is an amenable number.

72166012 is a deficient number, since it is larger than the sum of its proper divisors (54203924).

72166012 is a wasteful number, since it uses less digits than its factorization.

72166012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11348 (or 11346 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 72166012 is about 8495.0580927972. The cubic root of 72166012 is about 416.3362588807.

The spelling of 72166012 in words is "seventy-two million, one hundred sixty-six thousand, twelve".