664161461 has 8 divisors (see below), whose sum is σ = 666758400. Its totient is φ = 661570560.

The previous prime is 664161439. The next prime is 664161467. The reversal of 664161461 is 164161466.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664161461 is a prime.

It is a super-2 number, since 2×664161461² = 882220892555309042, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664161467) 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, 376700 + ... + 378458.

It is an arithmetic number, because the mean of its divisors is an integer number (83344800).

Almost surely, 2^664161461 is an apocalyptic number.

It is an amenable number.

664161461 is a deficient number, since it is larger than the sum of its proper divisors (2596939).

664161461 is a wasteful number, since it uses less digits than its factorization.

664161461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019.

The product of its digits is 20736, while the sum is 35.

The square root of 664161461 is about 25771.3302140188. The cubic root of 664161461 is about 872.4848418425.

The spelling of 664161461 in words is "six hundred sixty-four million, one hundred sixty-one thousand, four hundred sixty-one".