77693966 has 8 divisors (see below), whose sum is σ = 133189680. Its totient is φ = 33297408.

The previous prime is 77693963. The next prime is 77693989. The reversal of 77693966 is 66939677.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77693963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2774771 + ... + 2774798.

It is an arithmetic number, because the mean of its divisors is an integer number (16648710).

Almost surely, 2^77693966 is an apocalyptic number.

77693966 is a deficient number, since it is larger than the sum of its proper divisors (55495714).

77693966 is a wasteful number, since it uses less digits than its factorization.

77693966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5549578.

The product of its digits is 2571912, while the sum is 53.

The square root of 77693966 is about 8814.4180749497. The cubic root of 77693966 is about 426.7063413898.

The spelling of 77693966 in words is "seventy-seven million, six hundred ninety-three thousand, nine hundred sixty-six".