665054 has 8 divisors (see below), whose sum is σ = 1074360. Its totient is φ = 306936.

The previous prime is 665053. The next prime is 665069. The reversal of 665054 is 450566.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 25579 = 665054 / (6 + 6 + 5 + 0 + 5 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12764 + ... + 12815.

It is an arithmetic number, because the mean of its divisors is an integer number (134295).

2⁶⁶⁵⁰⁵⁴ is an apocalyptic number.

665054 is a deficient number, since it is larger than the sum of its proper divisors (409306).

665054 is a wasteful number, since it uses less digits than its factorization.

665054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25594.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 665054 is about 815.5084303672. The cubic root of 665054 is about 87.2875498945.

The spelling of 665054 in words is "six hundred sixty-five thousand, fifty-four".