1670739057 has 12 divisors (see below), whose sum is σ = 2598927604. Its totient is φ = 1028147040.

The previous prime is 1670739043. The next prime is 1670739139. The reversal of 1670739057 is 7509370761.

It can be written as a sum of positive squares in 2 ways, for example, as 359140401 + 1311598656 = 18951^2 + 36216^2 .

It is not a de Polignac number, because 1670739057 - 2⁴ = 1670739041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1670731057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7139794 + ... + 7140027.

Almost surely, 2^1670739057 is an apocalyptic number.

It is an amenable number.

1670739057 is a deficient number, since it is larger than the sum of its proper divisors (928188547).

1670739057 is a wasteful number, since it uses less digits than its factorization.

1670739057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14279840 (or 14279837 counting only the distinct ones).

The product of its (nonzero) digits is 277830, while the sum is 45.

The square root of 1670739057 is about 40874.6750078823. The cubic root of 1670739057 is about 1186.5959865725.

The spelling of 1670739057 in words is "one billion, six hundred seventy million, seven hundred thirty-nine thousand, fifty-seven".