77272664 has 16 divisors (see below), whose sum is σ = 165584400. Its totient is φ = 33116832.

The previous prime is 77272661. The next prime is 77272681. The reversal of 77272664 is 46627277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77272661) 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, 689879 + ... + 689990.

It is an arithmetic number, because the mean of its divisors is an integer number (10349025).

Almost surely, 2^77272664 is an apocalyptic number.

It is an amenable number.

77272664 is an abundant number, since it is smaller than the sum of its proper divisors (88311736).

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

77272664 is a wasteful number, since it uses less digits than its factorization.

77272664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379882 (or 1379878 counting only the distinct ones).

The product of its digits is 197568, while the sum is 41.

The square root of 77272664 is about 8790.4871309843. The cubic root of 77272664 is about 425.9336595027.

The spelling of 77272664 in words is "seventy-seven million, two hundred seventy-two thousand, six hundred sixty-four".