66767073344 has 14 divisors (see below), whose sum is σ = 132490911294. Its totient is φ = 33383536640.

The previous prime is 66767073343. The next prime is 66767073377. The reversal of 66767073344 is 44337076766.

It can be written as a sum of positive squares in only one way, i.e., 53320351744 + 13446721600 = 230912^2 + 115960^2 .

It is not an unprimeable number, because it can be changed into a prime (66767073341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521617697 + ... + 521617824.

It is an arithmetic number, because the mean of its divisors is an integer number (9463636521).

Almost surely, 2^66767073344 is an apocalyptic number.

66767073344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66767073344 is a deficient number, since it is larger than the sum of its proper divisors (65723837950).

66767073344 is a wasteful number, since it uses less digits than its factorization.

66767073344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043235533 (or 1043235523 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 53.

The spelling of 66767073344 in words is "sixty-six billion, seven hundred sixty-seven million, seventy-three thousand, three hundred forty-four".