1665867036 has 48 divisors (see below), whose sum is σ = 3947747328. Its totient is φ = 546638400.

The previous prime is 1665867019. The next prime is 1665867041. The reversal of 1665867036 is 6307685661.

It is a super-2 number, since 2×1665867036² = 5550225963262850592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843346 + ... + 845318.

It is an arithmetic number, because the mean of its divisors is an integer number (82244736).

Almost surely, 2^1665867036 is an apocalyptic number.

It is an amenable number.

1665867036 is an abundant number, since it is smaller than the sum of its proper divisors (2281880292).

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

1665867036 is a wasteful number, since it uses less digits than its factorization.

1665867036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3042 (or 3040 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 1665867036 is about 40815.0344358546. The cubic root of 1665867036 is about 1185.4414577668.

The spelling of 1665867036 in words is "one billion, six hundred sixty-five million, eight hundred sixty-seven thousand, thirty-six".