66740244075 has 36 divisors (see below), whose sum is σ = 125830737240. Its totient is φ = 33721384320.

The previous prime is 66740244061. The next prime is 66740244107. The reversal of 66740244075 is 57044204766.

It is not a de Polignac number, because 66740244075 - 2¹⁰ = 66740243051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 66740244075.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7801602 + ... + 7810151.

Almost surely, 2^66740244075 is an apocalyptic number.

66740244075 is a deficient number, since it is larger than the sum of its proper divisors (59090493165).

66740244075 is a wasteful number, since it uses less digits than its factorization.

66740244075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15611788 (or 15611780 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 45.

The spelling of 66740244075 in words is "sixty-six billion, seven hundred forty million, two hundred forty-four thousand, seventy-five".