66996491824137 has 4 divisors (see below), whose sum is σ = 89328655765520. Its totient is φ = 44664327882756.

The previous prime is 66996491824081. The next prime is 66996491824183. The reversal of 66996491824137 is 73142819469966.

66996491824137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66996491824137 - 2¹⁶ = 66996491758601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66996491824037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11166081970687 + ... + 11166081970692.

It is an arithmetic number, because the mean of its divisors is an integer number (22332163941380).

Almost surely, 2^{66996491824137} is an apocalyptic number.

It is an amenable number.

66996491824137 is a deficient number, since it is larger than the sum of its proper divisors (22332163941383).

66996491824137 is a wasteful number, since it uses less digits than its factorization.

66996491824137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22332163941382.

The product of its digits is 846526464, while the sum is 75.

The spelling of 66996491824137 in words is "sixty-six trillion, nine hundred ninety-six billion, four hundred ninety-one million, eight hundred twenty-four thousand, one hundred thirty-seven".