98766665 has 4 divisors (see below), whose sum is σ = 118520004. Its totient is φ = 79013328.

The previous prime is 98766641. The next prime is 98766677. The reversal of 98766665 is 56666789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56666789 = 103 ⋅550163.

It can be written as a sum of positive squares in 2 ways, for example, as 59428681 + 39337984 = 7709^2 + 6272^2 .

It is a cyclic number.

It is not a de Polignac number, because 98766665 - 2¹⁶ = 98701129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9876662 + ... + 9876671.

It is an arithmetic number, because the mean of its divisors is an integer number (29630001).

Almost surely, 2^98766665 is an apocalyptic number.

It is an amenable number.

98766665 is a deficient number, since it is larger than the sum of its proper divisors (19753339).

98766665 is a wasteful number, since it uses less digits than its factorization.

98766665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19753338.

The product of its digits is 3265920, while the sum is 53.

The square root of 98766665 is about 9938.1419289523. The cubic root of 98766665 is about 462.2427729625.

The spelling of 98766665 in words is "ninety-eight million, seven hundred sixty-six thousand, six hundred sixty-five".