77996805 has 32 divisors (see below), whose sum is σ = 135907200. Its totient is φ = 38045952.

The previous prime is 77996773. The next prime is 77996839. The reversal of 77996805 is 50869977.

It is not a de Polignac number, because 77996805 - 2⁵ = 77996773 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3547 + ... + 12983.

It is an arithmetic number, because the mean of its divisors is an integer number (4247100).

Almost surely, 2^77996805 is an apocalyptic number.

It is an amenable number.

77996805 is a deficient number, since it is larger than the sum of its proper divisors (57910395).

77996805 is a wasteful number, since it uses less digits than its factorization.

77996805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9493.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 77996805 is about 8831.5799832193. The cubic root of 77996805 is about 427.2600342677.

The spelling of 77996805 in words is "seventy-seven million, nine hundred ninety-six thousand, eight hundred five".