670685042 has 4 divisors (see below), whose sum is σ = 1006027566. Its totient is φ = 335342520.

The previous prime is 670685039. The next prime is 670685053. The reversal of 670685042 is 240586076.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 566011681 + 104673361 = 23791^2 + 10231^2 .

It is a junction number, because it is equal to n+sod(n) for n = 670684987 and 670685005.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167671259 + ... + 167671262.

Almost surely, 2^670685042 is an apocalyptic number.

670685042 is a deficient number, since it is larger than the sum of its proper divisors (335342524).

670685042 is a wasteful number, since it uses less digits than its factorization.

670685042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335342523.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 670685042 is about 25897.5875710461. The cubic root of 670685042 is about 875.3321370934.

The spelling of 670685042 in words is "six hundred seventy million, six hundred eighty-five thousand, forty-two".