66405745708 has 12 divisors (see below), whose sum is σ = 119350867552. Its totient is φ = 32305497840.

The previous prime is 66405745697. The next prime is 66405745723. The reversal of 66405745708 is 80754750466.

66405745708 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224343588 + ... + 224343883.

Almost surely, 2^66405745708 is an apocalyptic number.

It is an amenable number.

66405745708 is a deficient number, since it is larger than the sum of its proper divisors (52945121844).

66405745708 is a wasteful number, since it uses less digits than its factorization.

66405745708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448687512 (or 448687510 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 52.

The spelling of 66405745708 in words is "sixty-six billion, four hundred five million, seven hundred forty-five thousand, seven hundred eight".