77506764 has 12 divisors (see below), whose sum is σ = 180849144. Its totient is φ = 25835584.

The previous prime is 77506753. The next prime is 77506777. The reversal of 77506764 is 46760577.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3229437 + ... + 3229460.

It is an arithmetic number, because the mean of its divisors is an integer number (15070762).

Almost surely, 2^77506764 is an apocalyptic number.

It is an amenable number.

77506764 is an abundant number, since it is smaller than the sum of its proper divisors (103342380).

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

77506764 is a wasteful number, since it uses less digits than its factorization.

77506764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6458904 (or 6458902 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 42.

The square root of 77506764 is about 8803.7925918322. The cubic root of 77506764 is about 426.3633524068.

The spelling of 77506764 in words is "seventy-seven million, five hundred six thousand, seven hundred sixty-four".