66740040704 has 22 divisors (see below), whose sum is σ = 133414907634. Its totient is φ = 33370019840.

The previous prime is 66740040691. The next prime is 66740040739. The reversal of 66740040704 is 40704004766.

It can be written as a sum of positive squares in only one way, i.e., 66357760000 + 382280704 = 257600^2 + 19552^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32586887 + ... + 32588934.

Almost surely, 2^66740040704 is an apocalyptic number.

66740040704 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66740040704 is a deficient number, since it is larger than the sum of its proper divisors (66674866930).

66740040704 is an equidigital number, since it uses as much as digits as its factorization.

66740040704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65175841 (or 65175823 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 38.

The spelling of 66740040704 in words is "sixty-six billion, seven hundred forty million, forty thousand, seven hundred four".