72166610 has 8 divisors (see below), whose sum is σ = 129899916. Its totient is φ = 28866640.

The previous prime is 72166603. The next prime is 72166637. The reversal of 72166610 is 1666127.

It can be written as a sum of positive squares in 2 ways, for example, as 67453369 + 4713241 = 8213^2 + 2171^2 .

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

It is a Curzon 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, 3608321 + ... + 3608340.

Almost surely, 2^72166610 is an apocalyptic number.

72166610 is a deficient number, since it is larger than the sum of its proper divisors (57733306).

72166610 is a wasteful number, since it uses less digits than its factorization.

72166610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7216668.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 72166610 is about 8495.0932896584. The cubic root of 72166610 is about 416.3374088606.

The spelling of 72166610 in words is "seventy-two million, one hundred sixty-six thousand, six hundred ten".