612664 has 32 divisors (see below), whose sum is σ = 1275120. Its totient is φ = 274176.

The previous prime is 612649. The next prime is 612671. The reversal of 612664 is 466216.

It is a happy number.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4404 + ... + 4540.

2⁶¹²⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (637560).

612664 is an abundant number, since it is smaller than the sum of its proper divisors (662456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

612664 is a wasteful number, since it uses less digits than its factorization.

612664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 195 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 612664 is about 782.7285608690. The cubic root of 612664 is about 84.9325416330.

The spelling of 612664 in words is "six hundred twelve thousand, six hundred sixty-four".