668662 has 4 divisors (see below), whose sum is σ = 1002996. Its totient is φ = 334330.

The previous prime is 668623. The next prime is 668671. The reversal of 668662 is 266866.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167164 + ... + 167167.

It is an arithmetic number, because the mean of its divisors is an integer number (250749).

2⁶⁶⁸⁶⁶² is an apocalyptic number.

668662 is a deficient number, since it is larger than the sum of its proper divisors (334334).

668662 is a wasteful number, since it uses less digits than its factorization.

668662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334333.

The product of its digits is 20736, while the sum is 34.

The square root of 668662 is about 817.7175551497. The cubic root of 668662 is about 87.4451138781.

The spelling of 668662 in words is "six hundred sixty-eight thousand, six hundred sixty-two".