664616411 has 16 divisors (see below), whose sum is σ = 717454080. Its totient is φ = 613370880.

The previous prime is 664616399. The next prime is 664616429. The reversal of 664616411 is 114616466.

It is not a de Polignac number, because 664616411 - 2¹⁸ = 664354267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664616431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423350 + ... + 424916.

It is an arithmetic number, because the mean of its divisors is an integer number (44840880).

Almost surely, 2^664616411 is an apocalyptic number.

664616411 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

664616411 is a deficient number, since it is larger than the sum of its proper divisors (52837669).

664616411 is a wasteful number, since it uses less digits than its factorization.

664616411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054.

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

The square root of 664616411 is about 25780.1553719135. The cubic root of 664616411 is about 872.6840134811.

Subtracting from 664616411 its reverse (114616466), we obtain a palindrome (549999945).

The spelling of 664616411 in words is "six hundred sixty-four million, six hundred sixteen thousand, four hundred eleven".