670654 has 16 divisors (see below), whose sum is σ = 1077120. Its totient is φ = 312480.

The previous prime is 670639. The next prime is 670669. The reversal of 670654 is 456076.

It is an interprime number because it is at equal distance from previous prime (670639) and next prime (670669).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1612 + ... + 1984.

It is an arithmetic number, because the mean of its divisors is an integer number (67320).

2⁶⁷⁰⁶⁵⁴ is an apocalyptic number.

670654 is a deficient number, since it is larger than the sum of its proper divisors (406466).

670654 is a wasteful number, since it uses less digits than its factorization.

670654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 670654 is about 818.9346738294. The cubic root of 670654 is about 87.5318632255.

The spelling of 670654 in words is "six hundred seventy thousand, six hundred fifty-four".