76221716 has 6 divisors (see below), whose sum is σ = 133388010. Its totient is φ = 38110856.

The previous prime is 76221713. The next prime is 76221721. The reversal of 76221716 is 61712267.

It can be written as a sum of positive squares in only one way, i.e., 49140100 + 27081616 = 7010^2 + 5204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76221713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9527711 + ... + 9527718.

It is an arithmetic number, because the mean of its divisors is an integer number (22231335).

Almost surely, 2^76221716 is an apocalyptic number.

It is an amenable number.

76221716 is a deficient number, since it is larger than the sum of its proper divisors (57166294).

76221716 is a wasteful number, since it uses less digits than its factorization.

76221716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19055433 (or 19055431 counting only the distinct ones).

The product of its digits is 7056, while the sum is 32.

The square root of 76221716 is about 8730.5049109430. The cubic root of 76221716 is about 423.9938663525.

The spelling of 76221716 in words is "seventy-six million, two hundred twenty-one thousand, seven hundred sixteen".