66503702279 has 16 divisors (see below), whose sum is σ = 82437880896. Its totient is φ = 52341504000.

The previous prime is 66503702203. The next prime is 66503702297. The reversal of 66503702279 is 97220730566.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-66503702279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66503702879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6810422 + ... + 6820179.

It is an arithmetic number, because the mean of its divisors is an integer number (5152367556).

Almost surely, 2^66503702279 is an apocalyptic number.

66503702279 is a deficient number, since it is larger than the sum of its proper divisors (15934178617).

66503702279 is a wasteful number, since it uses less digits than its factorization.

66503702279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13630666.

The product of its (nonzero) digits is 952560, while the sum is 47.

The spelling of 66503702279 in words is "sixty-six billion, five hundred three million, seven hundred two thousand, two hundred seventy-nine".