1066634666 has 8 divisors (see below), whose sum is σ = 1600365060. Its totient is φ = 533179648.

The previous prime is 1066634663. The next prime is 1066634669. The reversal of 1066634666 is 6664366601.

It is an interprime number because it is at equal distance from previous prime (1066634663) and next prime (1066634669).

It can be written as a sum of positive squares in 2 ways, for example, as 984641641 + 81993025 = 31379^2 + 9055^2 .

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

It is a super-2 number, since 2×1066634666² = 2275419021425863112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066634663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58871 + ... + 74826.

Almost surely, 2^1066634666 is an apocalyptic number.

1066634666 is a deficient number, since it is larger than the sum of its proper divisors (533730394).

1066634666 is a wasteful number, since it uses less digits than its factorization.

1066634666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137688.

The product of its (nonzero) digits is 559872, while the sum is 44.

The square root of 1066634666 is about 32659.3733252798. The cubic root of 1066634666 is about 1021.7356920839.

The spelling of 1066634666 in words is "one billion, sixty-six million, six hundred thirty-four thousand, six hundred sixty-six".