670668641 has 8 divisors (see below), whose sum is σ = 673791360. Its totient is φ = 667554048.

The previous prime is 670668629. The next prime is 670668659. The reversal of 670668641 is 146866076.

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 670668641 - 2²⁶ = 603559777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 670668592 and 670668601.

It is not an unprimeable number, because it can be changed into a prime (670638641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212225 + ... + 215361.

It is an arithmetic number, because the mean of its divisors is an integer number (84223920).

Almost surely, 2^670668641 is an apocalyptic number.

It is an amenable number.

670668641 is a deficient number, since it is larger than the sum of its proper divisors (3122719).

670668641 is a wasteful number, since it uses less digits than its factorization.

670668641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4063.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 670668641 is about 25897.2709179944. The cubic root of 670668641 is about 875.3250018816.

The spelling of 670668641 in words is "six hundred seventy million, six hundred sixty-eight thousand, six hundred forty-one".