66004802242691 has 8 divisors (see below), whose sum is σ = 71392496886480. Its totient is φ = 60661450765152.

The previous prime is 66004802242633. The next prime is 66004802242723. The reversal of 66004802242691 is 19624220840066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66004802242691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66004802242891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11085788465 + ... + 11085794418.

It is an arithmetic number, because the mean of its divisors is an integer number (8924062110810).

Almost surely, 2^{66004802242691} is an apocalyptic number.

66004802242691 is a deficient number, since it is larger than the sum of its proper divisors (5387694643789).

66004802242691 is a wasteful number, since it uses less digits than its factorization.

66004802242691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22171583125.

The product of its (nonzero) digits is 1990656, while the sum is 50.

The spelling of 66004802242691 in words is "sixty-six trillion, four billion, eight hundred two million, two hundred forty-two thousand, six hundred ninety-one".