66319854498 has 24 divisors (see below), whose sum is σ = 146750318208. Its totient is φ = 21636264312.

The previous prime is 66319854493. The next prime is 66319854553. The reversal of 66319854498 is 89445891366.

66319854498 is a `hidden beast` number, since 6 + 6 + 3 + 1 + 98 + 54 + 498 = 666.

It is not an unprimeable number, because it can be changed into a prime (66319854493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39195286 + ... + 39196977.

It is an arithmetic number, because the mean of its divisors is an integer number (6114596592).

Almost surely, 2^66319854498 is an apocalyptic number.

66319854498 is an abundant number, since it is smaller than the sum of its proper divisors (80430463710).

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

66319854498 is a wasteful number, since it uses less digits than its factorization.

66319854498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78392318 (or 78392315 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 63.

The spelling of 66319854498 in words is "sixty-six billion, three hundred nineteen million, eight hundred fifty-four thousand, four hundred ninety-eight".