66746761500 has 48 divisors (see below), whose sum is σ = 194366573856. Its totient is φ = 17799136000.

The previous prime is 66746761489. The next prime is 66746761511. The reversal of 66746761500 is 516764766.

It is an interprime number because it is at equal distance from previous prime (66746761489) and next prime (66746761511).

It is a self number, because there is not a number n which added to its sum of digits gives 66746761500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22247421 + ... + 22250420.

It is an arithmetic number, because the mean of its divisors is an integer number (4049303622).

Almost surely, 2^66746761500 is an apocalyptic number.

66746761500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66746761500 is an abundant number, since it is smaller than the sum of its proper divisors (127619812356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66746761500 is a wasteful number, since it uses less digits than its factorization.

66746761500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44497863 (or 44497851 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 66746761500 in words is "sixty-six billion, seven hundred forty-six million, seven hundred sixty-one thousand, five hundred".