66707044441 has 4 divisors (see below), whose sum is σ = 68509937572. Its totient is φ = 64904151312.

The previous prime is 66707044429. The next prime is 66707044457. The reversal of 66707044441 is 14444070766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24306057216 + 42400987225 = 155904^2 + 205915^2 .

It is a cyclic number.

It is not a de Polignac number, because 66707044441 - 2⁵ = 66707044409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66707044471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901446510 + ... + 901446583.

It is an arithmetic number, because the mean of its divisors is an integer number (17127484393).

Almost surely, 2^66707044441 is an apocalyptic number.

It is an amenable number.

66707044441 is a deficient number, since it is larger than the sum of its proper divisors (1802893131).

66707044441 is a wasteful number, since it uses less digits than its factorization.

66707044441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802893130.

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 66707044441 in words is "sixty-six billion, seven hundred seven million, forty-four thousand, four hundred forty-one".