66477673498798 has 32 divisors (see below), whose sum is σ = 100325652615360. Its totient is φ = 33036317475840.

The previous prime is 66477673498759. The next prime is 66477673498861. The reversal of 66477673498798 is 89789437677466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1353430936 + ... + 1353480052.

It is an arithmetic number, because the mean of its divisors is an integer number (3135176644230).

Almost surely, 2^{66477673498798} is an apocalyptic number.

66477673498798 is a deficient number, since it is larger than the sum of its proper divisors (33847979116562).

66477673498798 is a wasteful number, since it uses less digits than its factorization.

66477673498798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54412.

The product of its digits is 129048256512, while the sum is 91.

The spelling of 66477673498798 in words is "sixty-six trillion, four hundred seventy-seven billion, six hundred seventy-three million, four hundred ninety-eight thousand, seven hundred ninety-eight".