1670438566 has 4 divisors (see below), whose sum is σ = 2505657852. Its totient is φ = 835219282.

The previous prime is 1670438543. The next prime is 1670438591. The reversal of 1670438566 is 6658340761.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417609640 + ... + 417609643.

It is an arithmetic number, because the mean of its divisors is an integer number (626414463).

Almost surely, 2^1670438566 is an apocalyptic number.

1670438566 is a deficient number, since it is larger than the sum of its proper divisors (835219286).

1670438566 is an equidigital number, since it uses as much as digits as its factorization.

1670438566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835219285.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 1670438566 is about 40870.9990824790. Note that the first 3 decimals coincide. The cubic root of 1670438566 is about 1186.5248438464.

The spelling of 1670438566 in words is "one billion, six hundred seventy million, four hundred thirty-eight thousand, five hundred sixty-six".