670655 has 8 divisors (see below), whose sum is σ = 812592. Its totient is φ = 531328.

The previous prime is 670639. The next prime is 670669. The reversal of 670655 is 556076.

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

It is a cyclic number.

It is not a de Polignac number, because 670655 - 2⁴ = 670639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 670655.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29 + ... + 1158.

It is an arithmetic number, because the mean of its divisors is an integer number (101574).

2⁶⁷⁰⁶⁵⁵ is an apocalyptic number.

670655 is a deficient number, since it is larger than the sum of its proper divisors (141937).

670655 is a wasteful number, since it uses less digits than its factorization.

670655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 670655 is about 818.9352843784. The cubic root of 670655 is about 87.5319067312.

The spelling of 670655 in words is "six hundred seventy thousand, six hundred fifty-five".