66700737774 has 96 divisors (see below), whose sum is σ = 166480479360. Its totient is φ = 19087790400.

The previous prime is 66700737757. The next prime is 66700737833. The reversal of 66700737774 is 47773700766.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66700737774.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1164589 + ... + 1220519.

It is an arithmetic number, because the mean of its divisors is an integer number (1734171660).

Almost surely, 2^66700737774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66700737774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83240239680).

66700737774 is an abundant number, since it is smaller than the sum of its proper divisors (99779741586).

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

66700737774 is a wasteful number, since it uses less digits than its factorization.

66700737774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56286 (or 56283 counting only the distinct ones).

The product of its (nonzero) digits is 7260624, while the sum is 54.

The spelling of 66700737774 in words is "sixty-six billion, seven hundred million, seven hundred thirty-seven thousand, seven hundred seventy-four".