77866377268464 has 160 divisors (see below), whose sum is σ = 233810318664000. Its totient is φ = 24778864889856.

The previous prime is 77866377268409. The next prime is 77866377268591. The reversal of 77866377268464 is 46486277366877.

77866377268464 is a `hidden beast` number, since 7 + 7 + 8 + 6 + 63 + 77 + 26 + 8 + 464 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33802917 + ... + 36032900.

It is an arithmetic number, because the mean of its divisors is an integer number (1461314491650).

Almost surely, 2^{77866377268464} is an apocalyptic number.

It is an amenable number.

77866377268464 is an abundant number, since it is smaller than the sum of its proper divisors (155943941395536).

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

77866377268464 is a wasteful number, since it uses less digits than its factorization.

77866377268464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69835952 (or 69835940 counting only the distinct ones).

The product of its digits is 19118260224, while the sum is 81.

The spelling of 77866377268464 in words is "seventy-seven trillion, eight hundred sixty-six billion, three hundred seventy-seven million, two hundred sixty-eight thousand, four hundred sixty-four".