66495900808 has 16 divisors (see below), whose sum is σ = 125238919680. Its totient is φ = 33098855568.

The previous prime is 66495900763. The next prime is 66495900827. The reversal of 66495900808 is 80800959466.

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, 18634960 + ... + 18638527.

It is an arithmetic number, because the mean of its divisors is an integer number (7827432480).

Almost surely, 2^66495900808 is an apocalyptic number.

It is an amenable number.

66495900808 is a deficient number, since it is larger than the sum of its proper divisors (58743018872).

66495900808 is a wasteful number, since it uses less digits than its factorization.

66495900808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37273716 (or 37273712 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 66495900808 in words is "sixty-six billion, four hundred ninety-five million, nine hundred thousand, eight hundred eight".