1670740687 has 16 divisors (see below), whose sum is σ = 2103634944. Its totient is φ = 1288980000.

The previous prime is 1670740679. The next prime is 1670740711. The reversal of 1670740687 is 7860470761.

It is not a de Polignac number, because 1670740687 - 2³ = 1670740679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670740627) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 99639 + ... + 115192.

It is an arithmetic number, because the mean of its divisors is an integer number (131477184).

Almost surely, 2^1670740687 is an apocalyptic number.

1670740687 is a deficient number, since it is larger than the sum of its proper divisors (432894257).

1670740687 is a wasteful number, since it uses less digits than its factorization.

1670740687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214950.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 1670740687 is about 40874.6949468739. The cubic root of 1670740687 is about 1186.5963724598.

The spelling of 1670740687 in words is "one billion, six hundred seventy million, seven hundred forty thousand, six hundred eighty-seven".