72166161622 has 8 divisors (see below), whose sum is σ = 108251214696. Its totient is φ = 36082423392.

The previous prime is 72166161619. The next prime is 72166161707. The reversal of 72166161622 is 22616166127.

It is a happy number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177603 + ... + 419374.

It is an arithmetic number, because the mean of its divisors is an integer number (13531401837).

Almost surely, 2^72166161622 is an apocalyptic number.

72166161622 is a deficient number, since it is larger than the sum of its proper divisors (36085053074).

72166161622 is a wasteful number, since it uses less digits than its factorization.

72166161622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657422.

The product of its digits is 72576, while the sum is 40.

The spelling of 72166161622 in words is "seventy-two billion, one hundred sixty-six million, one hundred sixty-one thousand, six hundred twenty-two".