66196763658 has 48 divisors (see below), whose sum is σ = 151906102920. Its totient is φ = 20761740288.

The previous prime is 66196763639. The next prime is 66196763683. The reversal of 66196763658 is 85636769166.

It is a happy number.

66196763658 is a `hidden beast` number, since 6 + 619 + 6 + 7 + 6 + 3 + 6 + 5 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 58204940049 + 7991823609 = 241257^2 + 89397^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66196763595 and 66196763604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1124616 + ... + 1182012.

Almost surely, 2^66196763658 is an apocalyptic number.

66196763658 is an abundant number, since it is smaller than the sum of its proper divisors (85709339262).

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

66196763658 is a wasteful number, since it uses less digits than its factorization.

66196763658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61191 (or 61188 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

The spelling of 66196763658 in words is "sixty-six billion, one hundred ninety-six million, seven hundred sixty-three thousand, six hundred fifty-eight".