1665845466 has 8 divisors (see below), whose sum is σ = 3331690944. Its totient is φ = 555281820.

The previous prime is 1665845437. The next prime is 1665845483. The reversal of 1665845466 is 6645485661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1665845466 is an admirable number.

It is a super-2 number, since 2×1665845466² = 5550082233185514312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138820450 + ... + 138820461.

It is an arithmetic number, because the mean of its divisors is an integer number (416461368).

Almost surely, 2^1665845466 is an apocalyptic number.

1665845466 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1665845466 is a wasteful number, since it uses less digits than its factorization.

1665845466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277640916.

The product of its digits is 4147200, while the sum is 51.

The square root of 1665845466 is about 40814.7701941344. The cubic root of 1665845466 is about 1185.4363412955.

The spelling of 1665845466 in words is "one billion, six hundred sixty-five million, eight hundred forty-five thousand, four hundred sixty-six".