77766672 has 40 divisors (see below), whose sum is σ = 202494976. Its totient is φ = 25716096.

The previous prime is 77766641. The next prime is 77766673. The reversal of 77766672 is 27666777.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (77766673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283 + ... + 12474.

Almost surely, 2^77766672 is an apocalyptic number.

It is an amenable number.

77766672 is an abundant number, since it is smaller than the sum of its proper divisors (124728304).

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

77766672 is a wasteful number, since it uses less digits than its factorization.

77766672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12895 (or 12889 counting only the distinct ones).

The product of its digits is 1037232, while the sum is 48.

The square root of 77766672 is about 8818.5413759873. The cubic root of 77766672 is about 426.8394037988.

The spelling of 77766672 in words is "seventy-seven million, seven hundred sixty-six thousand, six hundred seventy-two".