98666548661 has 4 divisors (see below), whose sum is σ = 100018145292. Its totient is φ = 97314952032.

The previous prime is 98666548633. The next prime is 98666548703. The reversal of 98666548661 is 16684566689.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21132146161 + 77534402500 = 145369^2 + 278450^2 .

It is a cyclic number.

It is not a de Polignac number, because 98666548661 - 2²⁶ = 98599439797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98666548601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675798206 + ... + 675798351.

It is an arithmetic number, because the mean of its divisors is an integer number (25004536323).

Almost surely, 2^98666548661 is an apocalyptic number.

It is an amenable number.

98666548661 is a deficient number, since it is larger than the sum of its proper divisors (1351596631).

98666548661 is a wasteful number, since it uses less digits than its factorization.

98666548661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351596630.

The product of its digits is 89579520, while the sum is 65.

The spelling of 98666548661 in words is "ninety-eight billion, six hundred sixty-six million, five hundred forty-eight thousand, six hundred sixty-one".