977678876777 has 4 divisors (see below), whose sum is σ = 979415429520. Its totient is φ = 975942324036.

The previous prime is 977678876767. The next prime is 977678876789. The reversal of 977678876777 is 777678876779.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 977678876777 - 2⁴ = 977678876761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (977678876767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 868275527 + ... + 868276652.

It is an arithmetic number, because the mean of its divisors is an integer number (244853857380).

Almost surely, 2^977678876777 is an apocalyptic number.

It is an amenable number.

977678876777 is a deficient number, since it is larger than the sum of its proper divisors (1736552743).

977678876777 is a wasteful number, since it uses less digits than its factorization.

977678876777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736552742.

The product of its digits is 17076987648, while the sum is 86.

The spelling of 977678876777 in words is "nine hundred seventy-seven billion, six hundred seventy-eight million, eight hundred seventy-six thousand, seven hundred seventy-seven".