66126099 has 32 divisors (see below), whose sum is σ = 100638720. Its totient is φ = 38285568.

The previous prime is 66126097. The next prime is 66126143. The reversal of 66126099 is 99062166.

It is not a de Polignac number, because 66126099 - 2¹ = 66126097 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (66126097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172462 + ... + 172844.

It is an arithmetic number, because the mean of its divisors is an integer number (3144960).

Almost surely, 2^66126099 is an apocalyptic number.

66126099 is a deficient number, since it is larger than the sum of its proper divisors (34512621).

66126099 is a wasteful number, since it uses less digits than its factorization.

66126099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 66126099 is about 8131.7955581778. The cubic root of 66126099 is about 404.3812102067.

The spelling of 66126099 in words is "sixty-six million, one hundred twenty-six thousand, ninety-nine".