77223716 has 6 divisors (see below), whose sum is σ = 135141510. Its totient is φ = 38611856.

The previous prime is 77223709. The next prime is 77223763. The reversal of 77223716 is 61732277.

It can be written as a sum of positive squares in only one way, i.e., 75759616 + 1464100 = 8704^2 + 1210^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9652961 + ... + 9652968.

It is an arithmetic number, because the mean of its divisors is an integer number (22523585).

Almost surely, 2^77223716 is an apocalyptic number.

It is an amenable number.

77223716 is a deficient number, since it is larger than the sum of its proper divisors (57917794).

77223716 is a wasteful number, since it uses less digits than its factorization.

77223716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19305933 (or 19305931 counting only the distinct ones).

The product of its digits is 24696, while the sum is 35.

The square root of 77223716 is about 8787.7025438962. The cubic root of 77223716 is about 425.8437052921.

The spelling of 77223716 in words is "seventy-seven million, two hundred twenty-three thousand, seven hundred sixteen".