664360461 has 10 divisors (see below), whose sum is σ = 992439822. Its totient is φ = 442906920.

The previous prime is 664360447. The next prime is 664360481. The reversal of 664360461 is 164063466.

664360461 is a `hidden beast` number, since 6 + 6 + 43 + 604 + 6 + 1 = 666.

664360461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 608559561 + 55800900 = 24669^2 + 7470^2 .

It is not a de Polignac number, because 664360461 - 2⁵ = 664360429 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664360481) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4100910 + ... + 4101071.

Almost surely, 2^664360461 is an apocalyptic number.

It is an amenable number.

664360461 is a deficient number, since it is larger than the sum of its proper divisors (328079361).

664360461 is an equidigital number, since it uses as much as digits as its factorization.

664360461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8201993 (or 8201984 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 664360461 is about 25775.1908043374. The cubic root of 664360461 is about 872.5719728369.

The spelling of 664360461 in words is "six hundred sixty-four million, three hundred sixty thousand, four hundred sixty-one".