6638075091 has 16 divisors (see below), whose sum is σ = 9842476320. Its totient is φ = 4421652480.

The previous prime is 6638075069. The next prime is 6638075107. The reversal of 6638075091 is 1905708366.

It is a happy number.

6638075091 is a `hidden beast` number, since 6 + 63 + 80 + 7 + 509 + 1 = 666.

It is not a de Polignac number, because 6638075091 - 2¹³ = 6638066899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6638075891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70830 + ... + 135251.

It is an arithmetic number, because the mean of its divisors is an integer number (615154770).

Almost surely, 2^6638075091 is an apocalyptic number.

6638075091 is a deficient number, since it is larger than the sum of its proper divisors (3204401229).

6638075091 is a wasteful number, since it uses less digits than its factorization.

6638075091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207283 (or 207277 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 6638075091 is about 81474.3830354057. The cubic root of 6638075091 is about 1879.3776319066.

The spelling of 6638075091 in words is "six billion, six hundred thirty-eight million, seventy-five thousand, ninety-one".