77070772 has 12 divisors (see below), whose sum is σ = 136721956. Its totient is φ = 38007360.

The previous prime is 77070767. The next prime is 77070779. The reversal of 77070772 is 27707077.

It can be written as a sum of positive squares in 2 ways, for example, as 31427236 + 45643536 = 5606^2 + 6756^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77070779) 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, 131679 + ... + 132262.

Almost surely, 2^77070772 is an apocalyptic number.

It is an amenable number.

77070772 is a deficient number, since it is larger than the sum of its proper divisors (59651184).

77070772 is a wasteful number, since it uses less digits than its factorization.

77070772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264018 (or 264016 counting only the distinct ones).

The product of its (nonzero) digits is 33614, while the sum is 37.

The square root of 77070772 is about 8778.9960701666. The cubic root of 77070772 is about 425.5623872036.

The spelling of 77070772 in words is "seventy-seven million, seventy thousand, seven hundred seventy-two".