72652166 has 4 divisors (see below), whose sum is σ = 108978252. Its totient is φ = 36326082.

The previous prime is 72652157. The next prime is 72652171. The reversal of 72652166 is 66125627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66125627 = 1231 ⋅53717.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18163040 + ... + 18163043.

It is an arithmetic number, because the mean of its divisors is an integer number (27244563).

Almost surely, 2^72652166 is an apocalyptic number.

72652166 is a deficient number, since it is larger than the sum of its proper divisors (36326086).

72652166 is a wasteful number, since it uses less digits than its factorization.

72652166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36326085.

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

The square root of 72652166 is about 8523.6239945225. The cubic root of 72652166 is about 417.2690651566.

The spelling of 72652166 in words is "seventy-two million, six hundred fifty-two thousand, one hundred sixty-six".