66796473808 has 20 divisors (see below), whose sum is σ = 132574709988. Its totient is φ = 32583645440.

The previous prime is 66796473761. The next prime is 66796473817. The reversal of 66796473808 is 80837469766.

It is a happy number.

66796473808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 30111966784 + 36684507024 = 173528^2 + 191532^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66796473808.

It is a congruent number.

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, 50911291 + ... + 50912602.

Almost surely, 2^66796473808 is an apocalyptic number.

It is an amenable number.

66796473808 is a deficient number, since it is larger than the sum of its proper divisors (65778236180).

66796473808 is a wasteful number, since it uses less digits than its factorization.

66796473808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101823942 (or 101823936 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 64.

The spelling of 66796473808 in words is "sixty-six billion, seven hundred ninety-six million, four hundred seventy-three thousand, eight hundred eight".