72013166 has 4 divisors (see below), whose sum is σ = 108019752. Its totient is φ = 36006582.

The previous prime is 72013159. The next prime is 72013181. The reversal of 72013166 is 66131027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66131027 = 131 ⋅504817.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18003290 + ... + 18003293.

It is an arithmetic number, because the mean of its divisors is an integer number (27004938).

Almost surely, 2^72013166 is an apocalyptic number.

72013166 is a deficient number, since it is larger than the sum of its proper divisors (36006586).

72013166 is a wasteful number, since it uses less digits than its factorization.

72013166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36006585.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 72013166 is about 8486.0571527654. The cubic root of 72013166 is about 416.0421208275.

The spelling of 72013166 in words is "seventy-two million, thirteen thousand, one hundred sixty-six".