66604088801 has 4 divisors (see below), whose sum is σ = 66608016132. Its totient is φ = 66600161472.

The previous prime is 66604088797. The next prime is 66604088807. The reversal of 66604088801 is 10888040666.

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 16853232400 + 49750856401 = 129820^2 + 223049^2 .

It is a cyclic number.

It is not a de Polignac number, because 66604088801 - 2² = 66604088797 is a prime.

It is a super-2 number, since 2×66604088801² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66604088807) 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, 1938116 + ... + 1972181.

It is an arithmetic number, because the mean of its divisors is an integer number (16652004033).

Almost surely, 2^66604088801 is an apocalyptic number.

It is an amenable number.

66604088801 is a deficient number, since it is larger than the sum of its proper divisors (3927331).

66604088801 is a wasteful number, since it uses less digits than its factorization.

66604088801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3927330.

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 66604088801 in words is "sixty-six billion, six hundred four million, eighty-eight thousand, eight hundred one".