1670778868 has 24 divisors (see below), whose sum is σ = 3198837600. Its totient is φ = 757261920.

The previous prime is 1670778833. The next prime is 1670778913. The reversal of 1670778868 is 8688770761.

It is a super-2 number, since 2×1670778868² = 5583004051510722848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39046 + ... + 69757.

It is an arithmetic number, because the mean of its divisors is an integer number (133284900).

Almost surely, 2^1670778868 is an apocalyptic number.

It is an amenable number.

1670778868 is a deficient number, since it is larger than the sum of its proper divisors (1528058732).

1670778868 is a wasteful number, since it uses less digits than its factorization.

1670778868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109167 (or 109165 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 58.

The square root of 1670778868 is about 40875.1619935628. The cubic root of 1670778868 is about 1186.6054113831.

The spelling of 1670778868 in words is "one billion, six hundred seventy million, seven hundred seventy-eight thousand, eight hundred sixty-eight".