77276166478 has 16 divisors (see below), whose sum is σ = 135176968800. Its totient is φ = 33118356768.

The previous prime is 77276166463. The next prime is 77276166503. The reversal of 77276166478 is 87466167277.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56323051 + ... + 56324422.

It is an arithmetic number, because the mean of its divisors is an integer number (8448560550).

Almost surely, 2^77276166478 is an apocalyptic number.

77276166478 is a deficient number, since it is larger than the sum of its proper divisors (57900802322).

77276166478 is a wasteful number, since it uses less digits than its factorization.

77276166478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112647496 (or 112647482 counting only the distinct ones).

The product of its digits is 33191424, while the sum is 61.

The spelling of 77276166478 in words is "seventy-seven billion, two hundred seventy-six million, one hundred sixty-six thousand, four hundred seventy-eight".