77856366 has 16 divisors (see below), whose sum is σ = 177957504. Its totient is φ = 22244664.

The previous prime is 77856353. The next prime is 77856367. The reversal of 77856366 is 66365877.

It is a super-2 number, since 2×77856366² = 12123227453451912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77856367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926820 + ... + 926903.

It is an arithmetic number, because the mean of its divisors is an integer number (11122344).

Almost surely, 2^77856366 is an apocalyptic number.

77856366 is an abundant number, since it is smaller than the sum of its proper divisors (100101138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77856366 is a wasteful number, since it uses less digits than its factorization.

77856366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853735.

The product of its digits is 1270080, while the sum is 48.

The square root of 77856366 is about 8823.6254453597. The cubic root of 77856366 is about 427.0034424672.

The spelling of 77856366 in words is "seventy-seven million, eight hundred fifty-six thousand, three hundred sixty-six".