72190166 has 4 divisors (see below), whose sum is σ = 108285252. Its totient is φ = 36095082.

The previous prime is 72190159. The next prime is 72190199. The reversal of 72190166 is 66109127.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×72190166² = 10422840134215112, which contains 22 as substring.

It is a Curzon number.

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, 18047540 + ... + 18047543.

It is an arithmetic number, because the mean of its divisors is an integer number (27071313).

Almost surely, 2^72190166 is an apocalyptic number.

72190166 is a deficient number, since it is larger than the sum of its proper divisors (36095086).

72190166 is a wasteful number, since it uses less digits than its factorization.

72190166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36095085.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 72190166 is about 8496.4796239384. The cubic root of 72190166 is about 416.3827030169.

The spelling of 72190166 in words is "seventy-two million, one hundred ninety thousand, one hundred sixty-six".