666053 has 4 divisors (see below), whose sum is σ = 669600. Its totient is φ = 662508.

The previous prime is 666041. The next prime is 666067. The reversal of 666053 is 350666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 350666 = 2 ⋅175333.

It is a cyclic number.

It is not a de Polignac number, because 666053 - 2¹⁰ = 665029 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666013) 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, 1475 + ... + 1872.

It is an arithmetic number, because the mean of its divisors is an integer number (167400).

2⁶⁶⁶⁰⁵³ is an apocalyptic number.

It is an amenable number.

666053 is a deficient number, since it is larger than the sum of its proper divisors (3547).

666053 is a wasteful number, since it uses less digits than its factorization.

666053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 666053 is about 816.1207018573. The cubic root of 666053 is about 87.3312338844.

The spelling of 666053 in words is "six hundred sixty-six thousand, fifty-three".