1654663066 has 12 divisors (see below), whose sum is σ = 2887218378. Its totient is φ = 709141272.

The previous prime is 1654663009. The next prime is 1654663067. The reversal of 1654663066 is 6603664561.

It can be written as a sum of positive squares in only one way, i.e., 1212780625 + 441882441 = 34825^2 + 21021^2 .

It is not an unprimeable number, because it can be changed into a prime (1654663067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8442061 + ... + 8442256.

Almost surely, 2^1654663066 is an apocalyptic number.

1654663066 is a deficient number, since it is larger than the sum of its proper divisors (1232555312).

1654663066 is a wasteful number, since it uses less digits than its factorization.

1654663066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16884333 (or 16884326 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 1654663066 is about 40677.5499016349. The cubic root of 1654663066 is about 1182.7778722330. Note that the first 3 decimals are identical.

The spelling of 1654663066 in words is "one billion, six hundred fifty-four million, six hundred sixty-three thousand, sixty-six".