1670658859 has 4 divisors (see below), whose sum is σ = 1671517120. Its totient is φ = 1669800600.

The previous prime is 1670658827. The next prime is 1670658863. The reversal of 1670658859 is 9588560761.

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

It is a cyclic number.

It is not a de Polignac number, because 1670658859 - 2⁵ = 1670658827 is a prime.

It is a super-2 number, since 2×1670658859² = 5582202046310363762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1670658959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426204 + ... + 430105.

It is an arithmetic number, because the mean of its divisors is an integer number (417879280).

Almost surely, 2^1670658859 is an apocalyptic number.

1670658859 is a deficient number, since it is larger than the sum of its proper divisors (858261).

1670658859 is an equidigital number, since it uses as much as digits as its factorization.

1670658859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858260.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The square root of 1670658859 is about 40873.6939730189. The cubic root of 1670658859 is about 1186.5770001351.

The spelling of 1670658859 in words is "one billion, six hundred seventy million, six hundred fifty-eight thousand, eight hundred fifty-nine".