77961722 has 8 divisors (see below), whose sum is σ = 117158016. Its totient is φ = 38909052.

The previous prime is 77961707. The next prime is 77961761. The reversal of 77961722 is 22716977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 77961722.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34538 + ... + 36725.

It is an arithmetic number, because the mean of its divisors is an integer number (14644752).

Almost surely, 2^77961722 is an apocalyptic number.

77961722 is a deficient number, since it is larger than the sum of its proper divisors (39196294).

77961722 is a wasteful number, since it uses less digits than its factorization.

77961722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71812.

The product of its digits is 74088, while the sum is 41.

The square root of 77961722 is about 8829.5935353786. The cubic root of 77961722 is about 427.1959640716.

The spelling of 77961722 in words is "seventy-seven million, nine hundred sixty-one thousand, seven hundred twenty-two".