135666690 has 16 divisors (see below), whose sum is σ = 325600128. Its totient is φ = 36177776.

The previous prime is 135666689. The next prime is 135666701. The reversal of 135666690 is 96666531.

It is a super-2 number, since 2×135666690² = 36810901551112200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2261082 + ... + 2261141.

It is an arithmetic number, because the mean of its divisors is an integer number (20350008).

Almost surely, 2^135666690 is an apocalyptic number.

135666690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135666690 is an abundant number, since it is smaller than the sum of its proper divisors (189933438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135666690 is a wasteful number, since it uses less digits than its factorization.

135666690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4522233.

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 135666690 is about 11647.6044747407. The cubic root of 135666690 is about 513.8358598160.

The spelling of 135666690 in words is "one hundred thirty-five million, six hundred sixty-six thousand, six hundred ninety".