66475859740 has 24 divisors (see below), whose sum is σ = 146946638160. Its totient is φ = 25190851968.

The previous prime is 66475859731. The next prime is 66475859771. The reversal of 66475859740 is 4795857466.

It is a happy number.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87467857 + ... + 87468616.

It is an arithmetic number, because the mean of its divisors is an integer number (6122776590).

Almost surely, 2^66475859740 is an apocalyptic number.

It is an amenable number.

66475859740 is an abundant number, since it is smaller than the sum of its proper divisors (80470778420).

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

66475859740 is a wasteful number, since it uses less digits than its factorization.

66475859740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174936501 (or 174936499 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 61.

The spelling of 66475859740 in words is "sixty-six billion, four hundred seventy-five million, eight hundred fifty-nine thousand, seven hundred forty".