77616970 has 8 divisors (see below), whose sum is σ = 139710564. Its totient is φ = 31046784.

The previous prime is 77616967. The next prime is 77616971. The reversal of 77616970 is 7961677.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 72267001 + 5349969 = 8501^2 + 2313^2 .

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

It is not an unprimeable number, because it can be changed into a prime (77616971) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3880839 + ... + 3880858.

Almost surely, 2^77616970 is an apocalyptic number.

77616970 is a deficient number, since it is larger than the sum of its proper divisors (62093594).

77616970 is a wasteful number, since it uses less digits than its factorization.

77616970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7761704.

The product of its (nonzero) digits is 111132, while the sum is 43.

The square root of 77616970 is about 8810.0493755711. The cubic root of 77616970 is about 426.5653371295.

The spelling of 77616970 in words is "seventy-seven million, six hundred sixteen thousand, nine hundred seventy".