654242566 has 4 divisors (see below), whose sum is σ = 981363852. Its totient is φ = 327121282.

The previous prime is 654242551. The next prime is 654242573. The reversal of 654242566 is 665242456.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163560640 + ... + 163560643.

It is an arithmetic number, because the mean of its divisors is an integer number (245340963).

Almost surely, 2^654242566 is an apocalyptic number.

654242566 is a deficient number, since it is larger than the sum of its proper divisors (327121286).

654242566 is a wasteful number, since it uses less digits than its factorization.

654242566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327121285.

The product of its digits is 345600, while the sum is 40.

The square root of 654242566 is about 25578.1658060151. The cubic root of 654242566 is about 868.1196744037.

The spelling of 654242566 in words is "six hundred fifty-four million, two hundred forty-two thousand, five hundred sixty-six".