1986678006 has 8 divisors (see below), whose sum is σ = 3973356024. Its totient is φ = 662226000.

The previous prime is 1986677993. The next prime is 1986678013. The reversal of 1986678006 is 6008766891.

It is a happy number.

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

1986678006 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1986678006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165556495 + ... + 165556506.

It is an arithmetic number, because the mean of its divisors is an integer number (496669503).

Almost surely, 2^1986678006 is an apocalyptic number.

1986678006 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1986678006 is a wasteful number, since it uses less digits than its factorization.

1986678006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331113006.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 1986678006 is about 44572.1662699941. The cubic root of 1986678006 is about 1257.1173721086.

The spelling of 1986678006 in words is "one billion, nine hundred eighty-six million, six hundred seventy-eight thousand, six".