670663 has 6 divisors (see below), whose sum is σ = 780216. Its totient is φ = 574812.

The previous prime is 670639. The next prime is 670669. The reversal of 670663 is 366076.

It is a de Polignac number, because none of the positive numbers 2^k-670663 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670669) 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, 6795 + ... + 6892.

It is an arithmetic number, because the mean of its divisors is an integer number (130036).

2⁶⁷⁰⁶⁶³ is an apocalyptic number.

670663 is a deficient number, since it is larger than the sum of its proper divisors (109553).

670663 is a wasteful number, since it uses less digits than its factorization.

670663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13701 (or 13694 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 670663 is about 818.9401687547. The cubic root of 670663 is about 87.5322547753.

The spelling of 670663 in words is "six hundred seventy thousand, six hundred sixty-three".