670942490 has 16 divisors (see below), whose sum is σ = 1212190920. Its totient is φ = 267378240.

The previous prime is 670942487. The next prime is 670942507. The reversal of 670942490 is 94249076.

It can be written as a sum of positive squares in 4 ways, for example, as 477815881 + 193126609 = 21859^2 + 13897^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122021 + ... + 127400.

Almost surely, 2^670942490 is an apocalyptic number.

670942490 is a deficient number, since it is larger than the sum of its proper divisors (541248430).

670942490 is a wasteful number, since it uses less digits than its factorization.

670942490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249697.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 670942490 is about 25902.5575957279. The cubic root of 670942490 is about 875.4441239255. Note that the first 3 decimals are identical.

The spelling of 670942490 in words is "six hundred seventy million, nine hundred forty-two thousand, four hundred ninety".