670005706 has 12 divisors (see below), whose sum is σ = 1016451702. Its totient is φ = 331230944.

The previous prime is 670005691. The next prime is 670005757. The reversal of 670005706 is 607500076.

It can be written as a sum of positive squares in 3 ways, for example, as 287607681 + 382398025 = 16959^2 + 19555^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5305 + ... + 36988.

Almost surely, 2^670005706 is an apocalyptic number.

670005706 is a deficient number, since it is larger than the sum of its proper divisors (346445996).

670005706 is an equidigital number, since it uses as much as digits as its factorization.

670005706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42473 (or 42384 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 670005706 is about 25884.4684318608. The cubic root of 670005706 is about 875.0364963281.

The spelling of 670005706 in words is "six hundred seventy million, five thousand, seven hundred six".