1066015665 has 72 divisors (see below), whose sum is σ = 2182894272. Its totient is φ = 477060480.

The previous prime is 1066015619. The next prime is 1066015667. The reversal of 1066015665 is 5665106601.

It is not a de Polignac number, because 1066015665 - 2⁸ = 1066015409 is a prime.

It is a super-2 number, since 2×1066015665² = 2272778796050784450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1066015667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 77284 + ... + 90026.

It is an arithmetic number, because the mean of its divisors is an integer number (30317976).

Almost surely, 2^1066015665 is an apocalyptic number.

1066015665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1066015665 is an abundant number, since it is smaller than the sum of its proper divisors (1116878607).

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

1066015665 is a wasteful number, since it uses less digits than its factorization.

1066015665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12791 (or 12775 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1066015665 is about 32649.8953290818. The cubic root of 1066015665 is about 1021.5380055910.

The spelling of 1066015665 in words is "one billion, sixty-six million, fifteen thousand, six hundred sixty-five".