1686663370 has 64 divisors (see below), whose sum is σ = 3628592640. Its totient is φ = 551916288.

The previous prime is 1686663367. The next prime is 1686663409. The reversal of 1686663370 is 733666861.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 1686663370.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 986076 + ... + 987784.

It is an arithmetic number, because the mean of its divisors is an integer number (56696760).

Almost surely, 2^1686663370 is an apocalyptic number.

1686663370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1686663370 is an abundant number, since it is smaller than the sum of its proper divisors (1941929270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1686663370 is a wasteful number, since it uses less digits than its factorization.

1686663370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359.

The product of its (nonzero) digits is 653184, while the sum is 46.

The square root of 1686663370 is about 41069.0074143508. The cubic root of 1686663370 is about 1190.3540057348.

The spelling of 1686663370 in words is "one billion, six hundred eighty-six million, six hundred sixty-three thousand, three hundred seventy".