66604066441 has 8 divisors (see below), whose sum is σ = 72675373824. Its totient is φ = 60535491120.

The previous prime is 66604066427. The next prime is 66604066493. The reversal of 66604066441 is 14466040666.

66604066441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 66604066441 - 2⁵ = 66604066409 is a prime.

It is a super-2 number, since 2×66604066441² (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 (66604016441) 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, 631870 + ... + 729703.

It is an arithmetic number, because the mean of its divisors is an integer number (9084421728).

Almost surely, 2^66604066441 is an apocalyptic number.

It is an amenable number.

66604066441 is a deficient number, since it is larger than the sum of its proper divisors (6071307383).

66604066441 is a wasteful number, since it uses less digits than its factorization.

66604066441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366031.

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 66604066441 in words is "sixty-six billion, six hundred four million, sixty-six thousand, four hundred forty-one".