670720617 has 12 divisors (see below), whose sum is σ = 1107221440. Its totient is φ = 383268888.

The previous prime is 670720607. The next prime is 670720621. The reversal of 670720617 is 716027076.

It is not a de Polignac number, because 670720617 - 2¹⁰ = 670719593 is a prime.

It is a super-2 number, since 2×670720617² = 899732292137721378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670720607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5323117 + ... + 5323242.

Almost surely, 2^670720617 is an apocalyptic number.

It is an amenable number.

670720617 is a deficient number, since it is larger than the sum of its proper divisors (436500823).

670720617 is a wasteful number, since it uses less digits than its factorization.

670720617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10646372 (or 10646369 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 670720617 is about 25898.2744019751. The cubic root of 670720617 is about 875.3476135034.

The spelling of 670720617 in words is "six hundred seventy million, seven hundred twenty thousand, six hundred seventeen".