66806246007 has 12 divisors (see below), whose sum is σ = 96533436480. Its totient is φ = 44521100928.

The previous prime is 66806245939. The next prime is 66806246011. The reversal of 66806246007 is 70064260866.

It is not a de Polignac number, because 66806246007 - 2¹² = 66806241911 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66806248007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1340538 + ... + 1389479.

It is an arithmetic number, because the mean of its divisors is an integer number (8044453040).

Almost surely, 2^66806246007 is an apocalyptic number.

66806246007 is a deficient number, since it is larger than the sum of its proper divisors (29727190473).

66806246007 is a wasteful number, since it uses less digits than its factorization.

66806246007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2732742 (or 2732739 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 66806246007 in words is "sixty-six billion, eight hundred six million, two hundred forty-six thousand, seven".