66736706736734 has 32 divisors (see below), whose sum is σ = 104048510370816. Its totient is φ = 32079156278400.

The previous prime is 66736706736709. The next prime is 66736706736737. The reversal of 66736706736734 is 43763760763766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66736706736737) 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, 2098259 + ... + 11742065.

It is an arithmetic number, because the mean of its divisors is an integer number (3251515949088).

Almost surely, 2^{66736706736734} is an apocalyptic number.

66736706736734 is a deficient number, since it is larger than the sum of its proper divisors (37311803634082).

66736706736734 is a wasteful number, since it uses less digits than its factorization.

66736706736734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9645120.

The product of its (nonzero) digits is 2016379008, while the sum is 71.

The spelling of 66736706736734 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred six million, seven hundred thirty-six thousand, seven hundred thirty-four".