77740646 has 16 divisors (see below), whose sum is σ = 119727168. Its totient is φ = 37837800.

The previous prime is 77740639. The next prime is 77740651. The reversal of 77740646 is 64604777.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27101 + ... + 29831.

It is an arithmetic number, because the mean of its divisors is an integer number (7482948).

Almost surely, 2^77740646 is an apocalyptic number.

77740646 is a deficient number, since it is larger than the sum of its proper divisors (41986522).

77740646 is a wasteful number, since it uses less digits than its factorization.

77740646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107.

The product of its (nonzero) digits is 197568, while the sum is 41.

The square root of 77740646 is about 8817.0656116420. The cubic root of 77740646 is about 426.7917820197.

The spelling of 77740646 in words is "seventy-seven million, seven hundred forty thousand, six hundred forty-six".