76978890677 has 8 divisors (see below), whose sum is σ = 82902660120. Its totient is φ = 71055452160.

The previous prime is 76978890643. The next prime is 76978890701. The reversal of 76978890677 is 77609887967.

It can be written as a sum of positive squares in 4 ways, for example, as 603488356 + 76375402321 = 24566^2 + 276361^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76978890677 - 2¹⁰ = 76978889653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76978890607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624149 + ... + 737237.

It is an arithmetic number, because the mean of its divisors is an integer number (10362832515).

Almost surely, 2^76978890677 is an apocalyptic number.

It is an amenable number.

76978890677 is a deficient number, since it is larger than the sum of its proper divisors (5923769443).

76978890677 is a wasteful number, since it uses less digits than its factorization.

76978890677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165463.

The product of its (nonzero) digits is 448084224, while the sum is 74.

The spelling of 76978890677 in words is "seventy-six billion, nine hundred seventy-eight million, eight hundred ninety thousand, six hundred seventy-seven".