133496665 has 16 divisors (see below), whose sum is σ = 172825488. Its totient is φ = 98615296.

The previous prime is 133496653. The next prime is 133496677. The reversal of 133496665 is 566694331.

It is an interprime number because it is at equal distance from previous prime (133496653) and next prime (133496677).

It can be written as a sum of positive squares in 8 ways, for example, as 35664784 + 97831881 = 5972^2 + 9891^2 .

It is a cyclic number.

It is not a de Polignac number, because 133496665 - 2⁷ = 133496537 is a prime.

It is a super-2 number, since 2×133496665² = 35642719132244450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10312 + ... + 19321.

It is an arithmetic number, because the mean of its divisors is an integer number (10801593).

Almost surely, 2^133496665 is an apocalyptic number.

It is an amenable number.

133496665 is a deficient number, since it is larger than the sum of its proper divisors (39328823).

133496665 is a wasteful number, since it uses less digits than its factorization.

133496665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29708.

The product of its digits is 349920, while the sum is 43.

The square root of 133496665 is about 11554.0756878255. The cubic root of 133496665 is about 511.0814741357.

The spelling of 133496665 in words is "one hundred thirty-three million, four hundred ninety-six thousand, six hundred sixty-five".