1466670665 has 24 divisors (see below), whose sum is σ = 1874559192. Its totient is φ = 1101404160.

The previous prime is 1466670659. The next prime is 1466670671. The reversal of 1466670665 is 5660766641.

It is an interprime number because it is at equal distance from previous prime (1466670659) and next prime (1466670671).

It can be written as a sum of positive squares in 12 ways, for example, as 23658496 + 1443012169 = 4864^2 + 37987^2 .

It is not a de Polignac number, because 1466670665 - 2⁴ = 1466670649 is a prime.

It is a super-2 number, since 2×1466670665² = 4302245679143084450, which contains 22 as substring.

It is a Duffinian number.

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, 659255 + ... + 661475.

It is an arithmetic number, because the mean of its divisors is an integer number (78106633).

Almost surely, 2^1466670665 is an apocalyptic number.

It is an amenable number.

1466670665 is a deficient number, since it is larger than the sum of its proper divisors (407888527).

1466670665 is a wasteful number, since it uses less digits than its factorization.

1466670665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717 (or 2700 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 47.

The square root of 1466670665 is about 38297.1365117550. The cubic root of 1466670665 is about 1136.1723130242.

The spelling of 1466670665 in words is "one billion, four hundred sixty-six million, six hundred seventy thousand, six hundred sixty-five".