163040666 has 4 divisors (see below), whose sum is σ = 244561002. Its totient is φ = 81520332.

The previous prime is 163040663. The next prime is 163040699. The reversal of 163040666 is 666040361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 98704225 + 64336441 = 9935^2 + 8021^2 .

It is not an unprimeable number, because it can be changed into a prime (163040663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40760165 + ... + 40760168.

Almost surely, 2^163040666 is an apocalyptic number.

163040666 is a deficient number, since it is larger than the sum of its proper divisors (81520336).

163040666 is an equidigital number, since it uses as much as digits as its factorization.

163040666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81520335.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 163040666 is about 12768.7378389565. The cubic root of 163040666 is about 546.3009808120.

The spelling of 163040666 in words is "one hundred sixty-three million, forty thousand, six hundred sixty-six".