1670165491 has 8 divisors (see below), whose sum is σ = 1676473200. Its totient is φ = 1663867392.

The previous prime is 1670165473. The next prime is 1670165501. The reversal of 1670165491 is 1945610761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1670165491 - 2⁷ = 1670165363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1670165411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617460 + ... + 620158.

It is an arithmetic number, because the mean of its divisors is an integer number (209559150).

Almost surely, 2^1670165491 is an apocalyptic number.

1670165491 is a deficient number, since it is larger than the sum of its proper divisors (6307709).

1670165491 is a wasteful number, since it uses less digits than its factorization.

1670165491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4805.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 1670165491 is about 40867.6582519723. The cubic root of 1670165491 is about 1186.4601845935.

The spelling of 1670165491 in words is "one billion, six hundred seventy million, one hundred sixty-five thousand, four hundred ninety-one".