72666826 has 8 divisors (see below), whose sum is σ = 109122624. Its totient is φ = 36292620.

The previous prime is 72666767. The next prime is 72666827. The reversal of 72666826 is 62866627.

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

It is not an unprimeable number, because it can be changed into a prime (72666827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18120 + ... + 21763.

It is an arithmetic number, because the mean of its divisors is an integer number (13640328).

Almost surely, 2^72666826 is an apocalyptic number.

72666826 is a deficient number, since it is larger than the sum of its proper divisors (36455798).

72666826 is a wasteful number, since it uses less digits than its factorization.

72666826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40796.

The product of its digits is 290304, while the sum is 43.

The square root of 72666826 is about 8524.4839139974. The cubic root of 72666826 is about 417.2971292572.

The spelling of 72666826 in words is "seventy-two million, six hundred sixty-six thousand, eight hundred twenty-six".