668354 has 4 divisors (see below), whose sum is σ = 1002534. Its totient is φ = 334176.

The previous prime is 668347. The next prime is 668407. The reversal of 668354 is 453866.

668354 = 471² + 472² + 473².

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

It can be written as a sum of positive squares in only one way, i.e., 390625 + 277729 = 625^2 + 527^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 668354.

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, 167087 + ... + 167090.

2⁶⁶⁸³⁵⁴ is an apocalyptic number.

668354 is a deficient number, since it is larger than the sum of its proper divisors (334180).

668354 is a wasteful number, since it uses less digits than its factorization.

668354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334179.

The product of its digits is 17280, while the sum is 32.

The square root of 668354 is about 817.5292043713. The cubic root of 668354 is about 87.4316854537.

The spelling of 668354 in words is "six hundred sixty-eight thousand, three hundred fifty-four".