427664066 has 16 divisors (see below), whose sum is σ = 645129144. Its totient is φ = 212625024.

The previous prime is 427664059. The next prime is 427664077. The reversal of 427664066 is 660466724.

It can be written as a sum of positive squares in 4 ways, for example, as 326561041 + 101103025 = 18071^2 + 10055^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413486 + ... + 414518.

Almost surely, 2^427664066 is an apocalyptic number.

427664066 is a deficient number, since it is larger than the sum of its proper divisors (217465078).

427664066 is a wasteful number, since it uses less digits than its factorization.

427664066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005.

The product of its (nonzero) digits is 290304, while the sum is 41.

The square root of 427664066 is about 20680.0402804250. The cubic root of 427664066 is about 753.4149845365.

The spelling of 427664066 in words is "four hundred twenty-seven million, six hundred sixty-four thousand, sixty-six".