654452998661 has 16 divisors (see below), whose sum is σ = 816186674688. Its totient is φ = 509810079600.

The previous prime is 654452998613. The next prime is 654452998687. The reversal of 654452998661 is 166899254456.

It is a cyclic number.

It is not a de Polignac number, because 654452998661 - 2¹⁰ = 654452997637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654452998691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1019315 + ... + 1532288.

It is an arithmetic number, because the mean of its divisors is an integer number (51011667168).

Almost surely, 2^654452998661 is an apocalyptic number.

It is an amenable number.

654452998661 is a deficient number, since it is larger than the sum of its proper divisors (161733676027).

654452998661 is a wasteful number, since it uses less digits than its factorization.

654452998661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554952.

The product of its digits is 111974400, while the sum is 65.

The spelling of 654452998661 in words is "six hundred fifty-four billion, four hundred fifty-two million, nine hundred ninety-eight thousand, six hundred sixty-one".