72133166 has 16 divisors (see below), whose sum is σ = 124859904. Its totient is φ = 30613464.

The previous prime is 72133163. The next prime is 72133169. The reversal of 72133166 is 66133127.

It is an interprime number because it is at equal distance from previous prime (72133163) and next prime (72133169).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72133163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23570 + ... + 26453.

It is an arithmetic number, because the mean of its divisors is an integer number (7803744).

Almost surely, 2^72133166 is an apocalyptic number.

72133166 is a deficient number, since it is larger than the sum of its proper divisors (52726738).

72133166 is a wasteful number, since it uses less digits than its factorization.

72133166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50135.

The product of its digits is 4536, while the sum is 29.

The square root of 72133166 is about 8493.1246311355. The cubic root of 72133166 is about 416.2730848389.

The spelling of 72133166 in words is "seventy-two million, one hundred thirty-three thousand, one hundred sixty-six".