77670745 has 16 divisors (see below), whose sum is σ = 94711680. Its totient is φ = 61139584.

The previous prime is 77670737. The next prime is 77670757. The reversal of 77670745 is 54707677.

It is a cyclic number.

It is not a de Polignac number, because 77670745 - 2³ = 77670737 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 154164 + ... + 154666.

It is an arithmetic number, because the mean of its divisors is an integer number (5919480).

Almost surely, 2^77670745 is an apocalyptic number.

It is an amenable number.

77670745 is a deficient number, since it is larger than the sum of its proper divisors (17040935).

77670745 is a wasteful number, since it uses less digits than its factorization.

77670745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944.

The product of its (nonzero) digits is 288120, while the sum is 43.

The square root of 77670745 is about 8813.1007596646. The cubic root of 77670745 is about 426.6638261394.

The spelling of 77670745 in words is "seventy-seven million, six hundred seventy thousand, seven hundred forty-five".