72578166 has 16 divisors (see below), whose sum is σ = 147536688. Its totient is φ = 23796000.

The previous prime is 72578137. The next prime is 72578167. The reversal of 72578166 is 66187527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72578167) 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, 98785 + ... + 99516.

It is an arithmetic number, because the mean of its divisors is an integer number (9221043).

Almost surely, 2^72578166 is an apocalyptic number.

72578166 is an abundant number, since it is smaller than the sum of its proper divisors (74958522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72578166 is a wasteful number, since it uses less digits than its factorization.

72578166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198367.

The product of its digits is 141120, while the sum is 42.

The square root of 72578166 is about 8519.2820120008. The cubic root of 72578166 is about 417.1273469668.

The spelling of 72578166 in words is "seventy-two million, five hundred seventy-eight thousand, one hundred sixty-six".