27777673668 has 48 divisors (see below), whose sum is σ = 68639163264. Its totient is φ = 8713044480.

The previous prime is 27777673667. The next prime is 27777673699. The reversal of 27777673668 is 86637677772.

It is a junction number, because it is equal to n+sod(n) for n = 27777673599 and 27777673608.

It is not an unprimeable number, because it can be changed into a prime (27777673667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1967073 + ... + 1981143.

It is an arithmetic number, because the mean of its divisors is an integer number (1429982568).

Almost surely, 2^27777673668 is an apocalyptic number.

It is an amenable number.

27777673668 is an abundant number, since it is smaller than the sum of its proper divisors (40861489596).

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

27777673668 is a wasteful number, since it uses less digits than its factorization.

27777673668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23772 (or 23770 counting only the distinct ones).

The product of its digits is 174254976, while the sum is 66.

The spelling of 27777673668 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred seventy-three thousand, six hundred sixty-eight".