663057 has 6 divisors (see below), whose sum is σ = 957762. Its totient is φ = 442032.

The previous prime is 663053. The next prime is 663071. The reversal of 663057 is 750366.

It can be written as a sum of positive squares in only one way, i.e., 646416 + 16641 = 804^2 + 129^2 .

It is not a de Polignac number, because 663057 - 2² = 663053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663057.

It is not an unprimeable number, because it can be changed into a prime (663053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36828 + ... + 36845.

It is an arithmetic number, because the mean of its divisors is an integer number (159627).

2⁶⁶³⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

663057 is a deficient number, since it is larger than the sum of its proper divisors (294705).

663057 is a wasteful number, since it uses less digits than its factorization.

663057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73679 (or 73676 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 663057 is about 814.2831202966. The cubic root of 663057 is about 87.2000943382.

The spelling of 663057 in words is "six hundred sixty-three thousand, fifty-seven".