66104099 has 4 divisors (see below), whose sum is σ = 66220440. Its totient is φ = 65987760.

The previous prime is 66104069. The next prime is 66104107. The reversal of 66104099 is 99040166.

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

It is a cyclic number.

It is not a de Polignac number, because 66104099 - 2¹⁶ = 66038563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66104039) 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, 57314 + ... + 58455.

It is an arithmetic number, because the mean of its divisors is an integer number (16555110).

Almost surely, 2^66104099 is an apocalyptic number.

66104099 is a deficient number, since it is larger than the sum of its proper divisors (116341).

66104099 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 13 representation: 66104099 = (10906469)₁₃.

66104099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116340.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 66104099 is about 8130.4427308727. The cubic root of 66104099 is about 404.3363596684.

The spelling of 66104099 in words is "sixty-six million, one hundred four thousand, ninety-nine".