72004922566 has 4 divisors (see below), whose sum is σ = 108007383852. Its totient is φ = 36002461282.

The previous prime is 72004922557. The next prime is 72004922581. The reversal of 72004922566 is 66522940027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66522940027 = 439 ⋅151532893.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18001230640 + ... + 18001230643.

It is an arithmetic number, because the mean of its divisors is an integer number (27001845963).

Almost surely, 2^72004922566 is an apocalyptic number.

72004922566 is a deficient number, since it is larger than the sum of its proper divisors (36002461286).

72004922566 is a wasteful number, since it uses less digits than its factorization.

72004922566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36002461285.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 72004922566 in words is "seventy-two billion, four million, nine hundred twenty-two thousand, five hundred sixty-six".