77227660 has 12 divisors (see below), whose sum is σ = 162178128. Its totient is φ = 30891056.

The previous prime is 77227643. The next prime is 77227663. The reversal of 77227660 is 6672277.

It is a super-2 number, since 2×77227660² = 11928222938151200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77227663) 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, 1930672 + ... + 1930711.

It is an arithmetic number, because the mean of its divisors is an integer number (13514844).

Almost surely, 2^77227660 is an apocalyptic number.

It is an amenable number.

77227660 is an abundant number, since it is smaller than the sum of its proper divisors (84950468).

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

77227660 is a wasteful number, since it uses less digits than its factorization.

77227660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3861392 (or 3861390 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 77227660 is about 8787.9269455316. The cubic root of 77227660 is about 425.8509547878.

The spelling of 77227660 in words is "seventy-seven million, two hundred twenty-seven thousand, six hundred sixty".