1666466465 has 8 divisors (see below), whose sum is σ = 2001111720. Its totient is φ = 1332271872.

The previous prime is 1666466453. The next prime is 1666466467. The reversal of 1666466465 is 5646646661.

It can be written as a sum of positive squares in 4 ways, for example, as 5414929 + 1661051536 = 2327^2 + 40756^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1666466465 - 2⁶ = 1666466401 is a prime.

It is a super-2 number, since 2×1666466465² = 5554220957939192450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1666466467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104474 + ... + 119363.

It is an arithmetic number, because the mean of its divisors is an integer number (250138965).

Almost surely, 2^1666466465 is an apocalyptic number.

It is an amenable number.

1666466465 is a deficient number, since it is larger than the sum of its proper divisors (334645255).

1666466465 is a wasteful number, since it uses less digits than its factorization.

1666466465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225331.

The product of its digits is 3732480, while the sum is 50.

The square root of 1666466465 is about 40822.3770131040. The cubic root of 1666466465 is about 1185.5836265312.

The spelling of 1666466465 in words is "one billion, six hundred sixty-six million, four hundred sixty-six thousand, four hundred sixty-five".