66706562678 has 24 divisors (see below), whose sum is σ = 116411571504. Its totient is φ = 28584738000.

The previous prime is 66706562647. The next prime is 66706562683. The reversal of 66706562678 is 87626560766.

66706562678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 773528 + ... + 855428.

It is an arithmetic number, because the mean of its divisors is an integer number (4850482146).

Almost surely, 2^66706562678 is an apocalyptic number.

66706562678 is a deficient number, since it is larger than the sum of its proper divisors (49705008826).

66706562678 is a wasteful number, since it uses less digits than its factorization.

66706562678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90228 (or 90221 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 59.

The spelling of 66706562678 in words is "sixty-six billion, seven hundred six million, five hundred sixty-two thousand, six hundred seventy-eight".