1686006977690 has 32 divisors (see below), whose sum is σ = 3468550287744. Its totient is φ = 578027355840.

The previous prime is 1686006977651. The next prime is 1686006977713. The reversal of 1686006977690 is 967796006861.

It is a happy number.

It is a super-2 number, since 2×1686006977690² (a number of 25 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 613472 + ... + 1936068.

It is an arithmetic number, because the mean of its divisors is an integer number (108392196492).

Almost surely, 2^{1686006977690} is an apocalyptic number.

1686006977690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1686006977690 is an abundant number, since it is smaller than the sum of its proper divisors (1782543310054).

1686006977690 is a wasteful number, since it uses less digits than its factorization.

1686006977690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340822.

The product of its (nonzero) digits is 41150592, while the sum is 65.

The spelling of 1686006977690 in words is "one trillion, six hundred eighty-six billion, six million, nine hundred seventy-seven thousand, six hundred ninety".