66990107613 has 96 divisors (see below), whose sum is σ = 108939333888. Its totient is φ = 36346337280.

The previous prime is 66990107593. The next prime is 66990107617. The reversal of 66990107613 is 31670109966.

It is not a de Polignac number, because 66990107613 - 2⁹ = 66990107101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66990107617) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 103539256 + ... + 103539902.

It is an arithmetic number, because the mean of its divisors is an integer number (1134784728).

Almost surely, 2^66990107613 is an apocalyptic number.

It is an amenable number.

66990107613 is a deficient number, since it is larger than the sum of its proper divisors (41949226275).

66990107613 is a wasteful number, since it uses less digits than its factorization.

66990107613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315 (or 1304 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 48.

The spelling of 66990107613 in words is "sixty-six billion, nine hundred ninety million, one hundred seven thousand, six hundred thirteen".