1665266360 has 32 divisors (see below), whose sum is σ = 3817549440. Its totient is φ = 653537664.

The previous prime is 1665266329. The next prime is 1665266371. The reversal of 1665266360 is 636625661.

It is a happy number.

It is a super-2 number, since 2×1665266360² = 5546224099495299200, 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 7 ways as a sum of consecutive naturals, for example, 390632 + ... + 394871.

It is an arithmetic number, because the mean of its divisors is an integer number (119298420).

Almost surely, 2^1665266360 is an apocalyptic number.

1665266360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1665266360 is an abundant number, since it is smaller than the sum of its proper divisors (2152283080).

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

1665266360 is a wasteful number, since it uses less digits than its factorization.

1665266360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785567 (or 785563 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 1665266360 is about 40807.6752584609. The cubic root of 1665266360 is about 1185.2989590319.

The spelling of 1665266360 in words is "one billion, six hundred sixty-five million, two hundred sixty-six thousand, three hundred sixty".