66708038137 has 32 divisors (see below), whose sum is σ = 73903124736. Its totient is φ = 59832864000.

The previous prime is 66708038129. The next prime is 66708038147. The reversal of 66708038137 is 73183080766.

It is not a de Polignac number, because 66708038137 - 2³ = 66708038129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66708038147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43799658 + ... + 43801180.

It is an arithmetic number, because the mean of its divisors is an integer number (2309472648).

Almost surely, 2^66708038137 is an apocalyptic number.

It is an amenable number.

66708038137 is a deficient number, since it is larger than the sum of its proper divisors (7195086599).

66708038137 is a wasteful number, since it uses less digits than its factorization.

66708038137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 66708038137 in words is "sixty-six billion, seven hundred eight million, thirty-eight thousand, one hundred thirty-seven".