77221708 has 6 divisors (see below), whose sum is σ = 135137996. Its totient is φ = 38610852.

The previous prime is 77221691. The next prime is 77221709. The reversal of 77221708 is 80712277.

It is not an unprimeable number, because it can be changed into a prime (77221709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9652710 + ... + 9652717.

Almost surely, 2^77221708 is an apocalyptic number.

It is an amenable number.

77221708 is a deficient number, since it is larger than the sum of its proper divisors (57916288).

77221708 is a wasteful number, since it uses less digits than its factorization.

77221708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19305431 (or 19305429 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 77221708 is about 8787.5882925863. The cubic root of 77221708 is about 425.8400142776.

The spelling of 77221708 in words is "seventy-seven million, two hundred twenty-one thousand, seven hundred eight".