135666690237 has 16 divisors (see below), whose sum is σ = 216448281280. Its totient is φ = 83487193776.

The previous prime is 135666690233. The next prime is 135666690239. The reversal of 135666690237 is 732096666531.

It is not a de Polignac number, because 135666690237 - 2² = 135666690233 is a prime.

It is a super-2 number, since 2×135666690237² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135666690233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193257043 + ... + 193257744.

It is an arithmetic number, because the mean of its divisors is an integer number (13528017580).

Almost surely, 2^135666690237 is an apocalyptic number.

It is an amenable number.

135666690237 is a deficient number, since it is larger than the sum of its proper divisors (80781591043).

135666690237 is a wasteful number, since it uses less digits than its factorization.

135666690237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386514809 (or 386514803 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 54.

The spelling of 135666690237 in words is "one hundred thirty-five billion, six hundred sixty-six million, six hundred ninety thousand, two hundred thirty-seven".