66324456401 has 8 divisors (see below), whose sum is σ = 76139288064. Its totient is φ = 56594602080.

The previous prime is 66324456389. The next prime is 66324456427. The reversal of 66324456401 is 10465442366.

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 66324456401 - 2²⁶ = 66257347537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66324456001) 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, 21242660 + ... + 21245781.

It is an arithmetic number, because the mean of its divisors is an integer number (9517411008).

Almost surely, 2^66324456401 is an apocalyptic number.

It is an amenable number.

66324456401 is a deficient number, since it is larger than the sum of its proper divisors (9814831663).

66324456401 is a wasteful number, since it uses less digits than its factorization.

66324456401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42488671.

The product of its (nonzero) digits is 414720, while the sum is 41.

Adding to 66324456401 its reverse (10465442366), we get a palindrome (76789898767).

The spelling of 66324456401 in words is "sixty-six billion, three hundred twenty-four million, four hundred fifty-six thousand, four hundred one".