664741461 has 16 divisors (see below), whose sum is σ = 901817280. Its totient is φ = 435429120.

The previous prime is 664741457. The next prime is 664741513. The reversal of 664741461 is 164147466.

It is not a de Polignac number, because 664741461 - 2² = 664741457 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 (664741061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283030 + ... + 285368.

It is an arithmetic number, because the mean of its divisors is an integer number (56363580).

Almost surely, 2^664741461 is an apocalyptic number.

664741461 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

664741461 is a deficient number, since it is larger than the sum of its proper divisors (237075819).

664741461 is a wasteful number, since it uses less digits than its factorization.

664741461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956.

The product of its digits is 96768, while the sum is 39.

The square root of 664741461 is about 25782.5805729372. The cubic root of 664741461 is about 872.7387429413.

The spelling of 664741461 in words is "six hundred sixty-four million, seven hundred forty-one thousand, four hundred sixty-one".