654332661 has 12 divisors (see below), whose sum is σ = 980152992. Its totient is φ = 436221612.

The previous prime is 654332633. The next prime is 654332683. The reversal of 654332661 is 166233456.

It is not a de Polignac number, because 654332661 - 2⁵ = 654332629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654332611) 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 11 ways as a sum of consecutive naturals, for example, 1346121 + ... + 1346606.

It is an arithmetic number, because the mean of its divisors is an integer number (81679416).

Almost surely, 2^654332661 is an apocalyptic number.

It is an amenable number.

654332661 is a deficient number, since it is larger than the sum of its proper divisors (325820331).

654332661 is an equidigital number, since it uses as much as digits as its factorization.

654332661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692742 (or 2692730 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 654332661 is about 25579.9269154546. The cubic root of 654332661 is about 868.1595218325.

It can be divided in two parts, 6543 and 32661, that added together give a square (39204 = 198²).

The spelling of 654332661 in words is "six hundred fifty-four million, three hundred thirty-two thousand, six hundred sixty-one".