133876665 has 32 divisors (see below), whose sum is σ = 256314240. Its totient is φ = 65907648.

The previous prime is 133876663. The next prime is 133876703. The reversal of 133876665 is 566678331.

It is not a de Polignac number, because 133876665 - 2¹ = 133876663 is a prime.

It is a super-2 number, since 2×133876665² = 35845922863044450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 133876665.

It is not an unprimeable number, because it can be changed into a prime (133876661) 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 31 ways as a sum of consecutive naturals, for example, 36387 + ... + 39896.

It is an arithmetic number, because the mean of its divisors is an integer number (8009820).

Almost surely, 2^133876665 is an apocalyptic number.

133876665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133876665 is a deficient number, since it is larger than the sum of its proper divisors (122437575).

133876665 is a wasteful number, since it uses less digits than its factorization.

133876665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76310 (or 76304 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 133876665 is about 11570.5084157957. The cubic root of 133876665 is about 511.5659481020.

The spelling of 133876665 in words is "one hundred thirty-three million, eight hundred seventy-six thousand, six hundred sixty-five".