1670740685 has 8 divisors (see below), whose sum is σ = 2005473816. Its totient is φ = 1336202560.

The previous prime is 1670740679. The next prime is 1670740711. The reversal of 1670740685 is 5860470761.

It can be written as a sum of positive squares in 4 ways, for example, as 1119364 + 1669621321 = 1058^2 + 40861^2 .

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

It is not a de Polignac number, because 1670740685 - 2¹⁸ = 1670478541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29186 + ... + 64755.

It is an arithmetic number, because the mean of its divisors is an integer number (250684227).

Almost surely, 2^1670740685 is an apocalyptic number.

It is an amenable number.

1670740685 is a deficient number, since it is larger than the sum of its proper divisors (334733131).

1670740685 is an equidigital number, since it uses as much as digits as its factorization.

1670740685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97503.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 1670740685 is about 40874.6949224089. The cubic root of 1670740685 is about 1186.5963719863.

The spelling of 1670740685 in words is "one billion, six hundred seventy million, seven hundred forty thousand, six hundred eighty-five".