670608618749 has 4 divisors (see below), whose sum is σ = 670753745340. Its totient is φ = 670463492160.

The previous prime is 670608618709. The next prime is 670608618761. The reversal of 670608618749 is 947816806076.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 477639943225 + 192968675524 = 691115^2 + 439282^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670608618749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 670608618691 and 670608618700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670608618709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72556364 + ... + 72565605.

It is an arithmetic number, because the mean of its divisors is an integer number (167688436335).

Almost surely, 2^670608618749 is an apocalyptic number.

It is an amenable number.

670608618749 is a deficient number, since it is larger than the sum of its proper divisors (145126591).

670608618749 is a wasteful number, since it uses less digits than its factorization.

670608618749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145126590.

The product of its (nonzero) digits is 24385536, while the sum is 62.

The spelling of 670608618749 in words is "six hundred seventy billion, six hundred eight million, six hundred eighteen thousand, seven hundred forty-nine".