668053 has 4 divisors (see below), whose sum is σ = 669708. Its totient is φ = 666400.

The previous prime is 668051. The next prime is 668069. The reversal of 668053 is 350866.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 350866 = 2 ⋅175433.

It can be written as a sum of positive squares in 2 ways, for example, as 439569 + 228484 = 663^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 668053 - 2¹ = 668051 is a prime.

It is an Ulam number.

It is a Duffinian number.

668053 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668051) 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, 225 + ... + 1177.

It is an arithmetic number, because the mean of its divisors is an integer number (167427).

2⁶⁶⁸⁰⁵³ is an apocalyptic number.

It is an amenable number.

668053 is a deficient number, since it is larger than the sum of its proper divisors (1655).

668053 is an equidigital number, since it uses as much as digits as its factorization.

668053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 668053 is about 817.3450923570. The cubic root of 668053 is about 87.4185582341.

The spelling of 668053 in words is "six hundred sixty-eight thousand, fifty-three".