664662 has 8 divisors (see below), whose sum is σ = 1329336. Its totient is φ = 221552.

The previous prime is 664661. The next prime is 664663. The reversal of 664662 is 266466.

It is an interprime number because it is at equal distance from previous prime (664661) and next prime (664663).

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

664662 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55383 + ... + 55394.

It is an arithmetic number, because the mean of its divisors is an integer number (166167).

2⁶⁶⁴⁶⁶² is an apocalyptic number.

664662 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

664662 is a wasteful number, since it uses less digits than its factorization.

664662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110782.

The product of its digits is 10368, while the sum is 30.

The square root of 664662 is about 815.2680540779. The cubic root of 664662 is about 87.2703966786.

It can be divided in two parts, 664 and 662, that added together give a triangular number (1326 = T₅₁).

The spelling of 664662 in words is "six hundred sixty-four thousand, six hundred sixty-two".