77712772 has 6 divisors (see below), whose sum is σ = 135997358. Its totient is φ = 38856384.

The previous prime is 77712751. The next prime is 77712809. The reversal of 77712772 is 27721777.

It can be written as a sum of positive squares in only one way, i.e., 56791296 + 20921476 = 7536^2 + 4574^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714093 + ... + 9714100.

Almost surely, 2^77712772 is an apocalyptic number.

It is an amenable number.

77712772 is a deficient number, since it is larger than the sum of its proper divisors (58284586).

77712772 is a wasteful number, since it uses less digits than its factorization.

77712772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19428197 (or 19428195 counting only the distinct ones).

The product of its digits is 67228, while the sum is 40.

The square root of 77712772 is about 8815.4847853082. The cubic root of 77712772 is about 426.7407670237.

The spelling of 77712772 in words is "seventy-seven million, seven hundred twelve thousand, seven hundred seventy-two".