77222656 has 36 divisors (see below), whose sum is σ = 176168272. Its totient is φ = 33094656.

The previous prime is 77222627. The next prime is 77222657. The reversal of 77222656 is 65622277.

It is not an unprimeable number, because it can be changed into a prime (77222657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19755 + ... + 23338.

Almost surely, 2^77222656 is an apocalyptic number.

It is an amenable number.

77222656 is an abundant number, since it is smaller than the sum of its proper divisors (98945616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77222656 is an equidigital number, since it uses as much as digits as its factorization.

77222656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43116 (or 43102 counting only the distinct ones).

The product of its digits is 70560, while the sum is 37.

The square root of 77222656 is about 8787.6422321349. The cubic root of 77222656 is about 425.8417568562.

The spelling of 77222656 in words is "seventy-seven million, two hundred twenty-two thousand, six hundred fifty-six".