654621066 has 48 divisors (see below), whose sum is σ = 1549555488. Its totient is φ = 198079200.

The previous prime is 654621059. The next prime is 654621103. The reversal of 654621066 is 660126456.

It is a happy number.

654621066 is a `hidden beast` number, since 6 + 546 + 2 + 106 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 654621066.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 160545 + ... + 164571.

It is an arithmetic number, because the mean of its divisors is an integer number (32282406).

Almost surely, 2^654621066 is an apocalyptic number.

654621066 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

654621066 is an abundant number, since it is smaller than the sum of its proper divisors (894934422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

654621066 is a wasteful number, since it uses less digits than its factorization.

654621066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4867 (or 4864 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 654621066 is about 25585.5636248256. The cubic root of 654621066 is about 868.2870536852.

The spelling of 654621066 in words is "six hundred fifty-four million, six hundred twenty-one thousand, sixty-six".