72166526 has 8 divisors (see below), whose sum is σ = 110553120. Its totient is φ = 35315488.

The previous prime is 72166489. The next prime is 72166553. The reversal of 72166526 is 62566127.

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 383771 + ... + 383958.

It is an arithmetic number, because the mean of its divisors is an integer number (13819140).

Almost surely, 2^72166526 is an apocalyptic number.

72166526 is a deficient number, since it is larger than the sum of its proper divisors (38386594).

72166526 is a wasteful number, since it uses less digits than its factorization.

72166526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767778.

The product of its digits is 30240, while the sum is 35.

The square root of 72166526 is about 8495.0883456265. The cubic root of 72166526 is about 416.3372473254.

The spelling of 72166526 in words is "seventy-two million, one hundred sixty-six thousand, five hundred twenty-six".