72908666 has 8 divisors (see below), whose sum is σ = 114117984. Its totient is φ = 34869340.

The previous prime is 72908659. The next prime is 72908687. The reversal of 72908666 is 66680927.

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

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, 792440 + ... + 792531.

It is an arithmetic number, because the mean of its divisors is an integer number (14264748).

Almost surely, 2^72908666 is an apocalyptic number.

72908666 is a deficient number, since it is larger than the sum of its proper divisors (41209318).

72908666 is a wasteful number, since it uses less digits than its factorization.

72908666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584996.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 72908666 is about 8538.6571543774. The cubic root of 72908666 is about 417.7595474593.

The spelling of 72908666 in words is "seventy-two million, nine hundred eight thousand, six hundred sixty-six".