670645493 has 8 divisors (see below), whose sum is σ = 767143488. Its totient is φ = 574320384.

The previous prime is 670645483. The next prime is 670645541. The reversal of 670645493 is 394546076.

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 670645493 - 2⁸ = 670645237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670645403) 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, 34796 + ... + 50517.

It is an arithmetic number, because the mean of its divisors is an integer number (95892936).

Almost surely, 2^670645493 is an apocalyptic number.

It is an amenable number.

670645493 is a deficient number, since it is larger than the sum of its proper divisors (96497995).

670645493 is a wasteful number, since it uses less digits than its factorization.

670645493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86443.

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 670645493 is about 25896.8239944592. The cubic root of 670645493 is about 875.3149312074.

The spelling of 670645493 in words is "six hundred seventy million, six hundred forty-five thousand, four hundred ninety-three".