1665965466 has 48 divisors (see below), whose sum is σ = 3976015680. Its totient is φ = 499930560.

The previous prime is 1665965453. The next prime is 1665965489. The reversal of 1665965466 is 6645695661.

1665965466 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 96 + 546 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20451 + ... + 61238.

It is an arithmetic number, because the mean of its divisors is an integer number (82833660).

Almost surely, 2^1665965466 is an apocalyptic number.

1665965466 is an abundant number, since it is smaller than the sum of its proper divisors (2310050214).

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

1665965466 is a wasteful number, since it uses less digits than its factorization.

1665965466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81811 (or 81808 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 54.

The square root of 1665965466 is about 40816.2402237149. The cubic root of 1665965466 is about 1185.4648051093.

The spelling of 1665965466 in words is "one billion, six hundred sixty-five million, nine hundred sixty-five thousand, four hundred sixty-six".