72909566 has 8 divisors (see below), whose sum is σ = 115797600. Its totient is φ = 34310368.

The previous prime is 72909547. The next prime is 72909581. The reversal of 72909566 is 66590927.

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

It is a congruent number.

It is an unprimeable number.

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, 1072166 + ... + 1072233.

It is an arithmetic number, because the mean of its divisors is an integer number (14474700).

Almost surely, 2^72909566 is an apocalyptic number.

72909566 is a deficient number, since it is larger than the sum of its proper divisors (42888034).

72909566 is a wasteful number, since it uses less digits than its factorization.

72909566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144418.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 72909566 is about 8538.7098557101. The cubic root of 72909566 is about 417.7612664230.

The spelling of 72909566 in words is "seventy-two million, nine hundred nine thousand, five hundred sixty-six".