1665043056 has 60 divisors (see below), whose sum is σ = 4758972192. Its totient is φ = 543203328.

The previous prime is 1665043049. The next prime is 1665043069. The reversal of 1665043056 is 6503405661.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1665043056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116241 + ... + 129776.

Almost surely, 2^1665043056 is an apocalyptic number.

1665043056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1665043056 is an abundant number, since it is smaller than the sum of its proper divisors (3093929136).

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

1665043056 is a wasteful number, since it uses less digits than its factorization.

1665043056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246078 (or 246069 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1665043056 is about 40804.9391128084. The cubic root of 1665043056 is about 1185.2459757501.

The spelling of 1665043056 in words is "one billion, six hundred sixty-five million, forty-three thousand, fifty-six".