98666659 has 16 divisors (see below), whose sum is σ = 121669632. Its totient is φ = 77915808.

The previous prime is 98666647. The next prime is 98666683. The reversal of 98666659 is 95666689.

It is a cyclic number.

It is not a de Polignac number, because 98666659 - 2¹⁵ = 98633891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (98666629) 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, 88902 + ... + 90004.

It is an arithmetic number, because the mean of its divisors is an integer number (7604352).

Almost surely, 2^98666659 is an apocalyptic number.

98666659 is a deficient number, since it is larger than the sum of its proper divisors (23002973).

98666659 is a wasteful number, since it uses less digits than its factorization.

98666659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106.

The product of its digits is 4199040, while the sum is 55.

The square root of 98666659 is about 9933.1092312528. The cubic root of 98666659 is about 462.0867059268.

Multiplying 98666659 by its sum of digits (55), we get a palindrome (5426666245).

It can be divided in two parts, 9 and 8666659, that added together give a palindrome (8666668).

The spelling of 98666659 in words is "ninety-eight million, six hundred sixty-six thousand, six hundred fifty-nine".