1664365286 has 16 divisors (see below), whose sum is σ = 2508639120. Its totient is φ = 828162720.

The previous prime is 1664365277. The next prime is 1664365301. The reversal of 1664365286 is 6825634661.

It is a happy number.

It is a super-2 number, since 2×1664365286² = 5540223610483723592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1664365286.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379820 + ... + 384176.

It is an arithmetic number, because the mean of its divisors is an integer number (156789945).

Almost surely, 2^1664365286 is an apocalyptic number.

1664365286 is a deficient number, since it is larger than the sum of its proper divisors (844273834).

1664365286 is a wasteful number, since it uses less digits than its factorization.

1664365286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5239.

The product of its digits is 1244160, while the sum is 47.

The square root of 1664365286 is about 40796.6332679548. The cubic root of 1664365286 is about 1185.0851324240.

The spelling of 1664365286 in words is "one billion, six hundred sixty-four million, three hundred sixty-five thousand, two hundred eighty-six".