66641072706 has 48 divisors (see below), whose sum is σ = 160359210720. Its totient is φ = 20504942640.

The previous prime is 66641072699. The next prime is 66641072723. The reversal of 66641072706 is 60727014666.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3642040 + ... + 3660291.

It is an arithmetic number, because the mean of its divisors is an integer number (3340816890).

Almost surely, 2^66641072706 is an apocalyptic number.

66641072706 is an abundant number, since it is smaller than the sum of its proper divisors (93718138014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66641072706 is a wasteful number, since it uses less digits than its factorization.

66641072706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7302368 (or 7302349 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 66641072706 in words is "sixty-six billion, six hundred forty-one million, seventy-two thousand, seven hundred six".