72166572662 has 4 divisors (see below), whose sum is σ = 108249858996. Its totient is φ = 36083286330.

The previous prime is 72166572661. The next prime is 72166572677. The reversal of 72166572662 is 26627566127.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 72166572662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72166572661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18041643164 + ... + 18041643167.

It is an arithmetic number, because the mean of its divisors is an integer number (27062464749).

Almost surely, 2^72166572662 is an apocalyptic number.

72166572662 is a deficient number, since it is larger than the sum of its proper divisors (36083286334).

72166572662 is a wasteful number, since it uses less digits than its factorization.

72166572662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36083286333.

The product of its digits is 2540160, while the sum is 50.

The spelling of 72166572662 in words is "seventy-two billion, one hundred sixty-six million, five hundred seventy-two thousand, six hundred sixty-two".