677961698819 has 4 divisors (see below), whose sum is σ = 677994113160. Its totient is φ = 677929284480.

The previous prime is 677961698803. The next prime is 677961698867. The reversal of 677961698819 is 918896169776.

677961698819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 677961698819 - 2⁴ = 677961698803 is a prime.

It is a super-2 number, since 2×677961698819² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 677961698819.

It is not an unprimeable number, because it can be changed into a prime (677961698879) 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, 16175777 + ... + 16217634.

It is an arithmetic number, because the mean of its divisors is an integer number (169498528290).

Almost surely, 2^677961698819 is an apocalyptic number.

677961698819 is a deficient number, since it is larger than the sum of its proper divisors (32414341).

677961698819 is a wasteful number, since it uses less digits than its factorization.

677961698819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32414340.

The product of its digits is 493807104, while the sum is 77.

The spelling of 677961698819 in words is "six hundred seventy-seven billion, nine hundred sixty-one million, six hundred ninety-eight thousand, eight hundred nineteen".