66947695503 has 16 divisors (see below), whose sum is σ = 97288222080. Its totient is φ = 40702211424.

The previous prime is 66947695481. The next prime is 66947695517. The reversal of 66947695503 is 30559674966.

It is not a de Polignac number, because 66947695503 - 2⁵ = 66947695471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66947695523) 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, 10337773 + ... + 10344246.

It is an arithmetic number, because the mean of its divisors is an integer number (6080513880).

Almost surely, 2^66947695503 is an apocalyptic number.

66947695503 is a deficient number, since it is larger than the sum of its proper divisors (30340526577).

66947695503 is a wasteful number, since it uses less digits than its factorization.

66947695503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20682118.

The product of its (nonzero) digits is 36741600, while the sum is 60.

The spelling of 66947695503 in words is "sixty-six billion, nine hundred forty-seven million, six hundred ninety-five thousand, five hundred three".