66935782473 has 24 divisors (see below), whose sum is σ = 109925754912. Its totient is φ = 35999074944.

The previous prime is 66935782457. The next prime is 66935782489. The reversal of 66935782473 is 37428753966.

It is an interprime number because it is at equal distance from previous prime (66935782457) and next prime (66935782489).

It is not a de Polignac number, because 66935782473 - 2⁴ = 66935782457 is a prime.

It is a super-3 number, since 3×66935782473³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66935782373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13390015 + ... + 13395012.

It is an arithmetic number, because the mean of its divisors is an integer number (4580239788).

Almost surely, 2^66935782473 is an apocalyptic number.

It is an amenable number.

66935782473 is a deficient number, since it is larger than the sum of its proper divisors (42989972439).

66935782473 is a wasteful number, since it uses less digits than its factorization.

66935782473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26785061 (or 26785054 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 60.

The spelling of 66935782473 in words is "sixty-six billion, nine hundred thirty-five million, seven hundred eighty-two thousand, four hundred seventy-three".