1986686466 has 16 divisors (see below), whose sum is σ = 3974492064. Its totient is φ = 662042304.

The previous prime is 1986686461. The next prime is 1986686489. The reversal of 1986686466 is 6646866891.

It is a super-2 number, since 2×1986686466² = 7893846228375138312, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1986686461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22600 + ... + 66963.

It is an arithmetic number, because the mean of its divisors is an integer number (248405754).

Almost surely, 2^1986686466 is an apocalyptic number.

1986686466 is an abundant number, since it is smaller than the sum of its proper divisors (1987805598).

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

1986686466 is a wasteful number, since it uses less digits than its factorization.

1986686466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93265.

The product of its digits is 17915904, while the sum is 60.

The square root of 1986686466 is about 44572.2611721685. The cubic root of 1986686466 is about 1257.1191565276.

The spelling of 1986686466 in words is "one billion, nine hundred eighty-six million, six hundred eighty-six thousand, four hundred sixty-six".