664601401 has 8 divisors (see below), whose sum is σ = 669288960. Its totient is φ = 659930208.

The previous prime is 664601389. The next prime is 664601453. The reversal of 664601401 is 104106466.

664601401 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 664601401 - 2⁵ = 664601369 is a prime.

It is a super-2 number, since 2×664601401² = 883390044422325602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664601401.

It is not an unprimeable number, because it can be changed into a prime (664601461) 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, 83925 + ... + 91501.

It is an arithmetic number, because the mean of its divisors is an integer number (83661120).

Almost surely, 2^664601401 is an apocalyptic number.

It is an amenable number.

664601401 is a deficient number, since it is larger than the sum of its proper divisors (4687559).

664601401 is a wasteful number, since it uses less digits than its factorization.

664601401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8183.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 664601401 is about 25779.8642548792. The cubic root of 664601401 is about 872.6774437338.

Adding to 664601401 its reverse (104106466), we get a palindrome (768707867).

The spelling of 664601401 in words is "six hundred sixty-four million, six hundred one thousand, four hundred one".