664735461 has 8 divisors (see below), whose sum is σ = 954492000. Its totient is φ = 409067952.

The previous prime is 664735457. The next prime is 664735469. The reversal of 664735461 is 164537466.

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

It is not a de Polignac number, because 664735461 - 2² = 664735457 is a prime.

It is a super-2 number, since 2×664735461² = 883746466221765042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664735469) 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, 8522211 + ... + 8522288.

It is an arithmetic number, because the mean of its divisors is an integer number (119311500).

Almost surely, 2^664735461 is an apocalyptic number.

It is an amenable number.

664735461 is a deficient number, since it is larger than the sum of its proper divisors (289756539).

664735461 is a wasteful number, since it uses less digits than its factorization.

664735461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17044515.

The product of its digits is 362880, while the sum is 42.

The square root of 664735461 is about 25782.4642150435. The cubic root of 664735461 is about 872.7361171344.

The spelling of 664735461 in words is "six hundred sixty-four million, seven hundred thirty-five thousand, four hundred sixty-one".