66786520968244 has 96 divisors (see below), whose sum is σ = 152061090048000. Its totient is φ = 24887821157760.

The previous prime is 66786520968239. The next prime is 66786520968247. The reversal of 66786520968244 is 44286902568766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66786520968247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115527987 + ... + 116104645.

It is an arithmetic number, because the mean of its divisors is an integer number (1583969688000).

Almost surely, 2^{66786520968244} is an apocalyptic number.

It is an amenable number.

66786520968244 is an abundant number, since it is smaller than the sum of its proper divisors (85274569079756).

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

66786520968244 is a wasteful number, since it uses less digits than its factorization.

66786520968244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593053 (or 593051 counting only the distinct ones).

The product of its (nonzero) digits is 1672151040, while the sum is 73.

The spelling of 66786520968244 in words is "sixty-six trillion, seven hundred eighty-six billion, five hundred twenty million, nine hundred sixty-eight thousand, two hundred forty-four".