66764317503 has 16 divisors (see below), whose sum is σ = 95912764416. Its totient is φ = 41065997280.

The previous prime is 66764317441. The next prime is 66764317523. The reversal of 66764317503 is 30571346766.

It is not a de Polignac number, because 66764317503 - 2⁹ = 66764316991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66764317523) 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 15 ways as a sum of consecutive naturals, for example, 328743 + ... + 491528.

It is an arithmetic number, because the mean of its divisors is an integer number (5994547776).

Almost surely, 2^66764317503 is an apocalyptic number.

66764317503 is a deficient number, since it is larger than the sum of its proper divisors (29148446913).

66764317503 is a wasteful number, since it uses less digits than its factorization.

66764317503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822374.

The product of its (nonzero) digits is 1905120, while the sum is 48.

The spelling of 66764317503 in words is "sixty-six billion, seven hundred sixty-four million, three hundred seventeen thousand, five hundred three".