1670368685 has 4 divisors (see below), whose sum is σ = 2004442428. Its totient is φ = 1336294944.

The previous prime is 1670368657. The next prime is 1670368697. The reversal of 1670368685 is 5868630761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5868630761 = 7 ⋅838375823.

It can be written as a sum of positive squares in 2 ways, for example, as 228040201 + 1442328484 = 15101^2 + 37978^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670368685 - 2⁶ = 1670368621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167036864 + ... + 167036873.

It is an arithmetic number, because the mean of its divisors is an integer number (501110607).

Almost surely, 2^1670368685 is an apocalyptic number.

It is an amenable number.

1670368685 is a deficient number, since it is larger than the sum of its proper divisors (334073743).

1670368685 is an equidigital number, since it uses as much as digits as its factorization.

1670368685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334073742.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 1670368685 is about 40870.1441764034. The cubic root of 1670368685 is about 1186.5082979523.

The spelling of 1670368685 in words is "one billion, six hundred seventy million, three hundred sixty-eight thousand, six hundred eighty-five".