670641490 has 16 divisors (see below), whose sum is σ = 1209201048. Its totient is φ = 267801856.

The previous prime is 670641481. The next prime is 670641493. The reversal of 670641490 is 94146076.

It can be written as a sum of positive squares in 4 ways, for example, as 609941809 + 60699681 = 24697^2 + 7791^2 .

It is not an unprimeable number, because it can be changed into a prime (670641493) 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 7 ways as a sum of consecutive naturals, for example, 50617 + ... + 62476.

Almost surely, 2^670641490 is an apocalyptic number.

670641490 is a deficient number, since it is larger than the sum of its proper divisors (538559558).

670641490 is a wasteful number, since it uses less digits than its factorization.

670641490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113693.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 670641490 is about 25896.7467068742. The cubic root of 670641490 is about 875.3131896550.

The spelling of 670641490 in words is "six hundred seventy million, six hundred forty-one thousand, four hundred ninety".