135666245 has 16 divisors (see below), whose sum is σ = 191261952. Its totient is φ = 91076160.

The previous prime is 135666229. The next prime is 135666269. The reversal of 135666245 is 542666531.

It is a happy number.

It is not a de Polignac number, because 135666245 - 2⁴ = 135666229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135666199 and 135666208.

It is a congruent 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, 94157 + ... + 95586.

It is an arithmetic number, because the mean of its divisors is an integer number (11953872).

Almost surely, 2^135666245 is an apocalyptic number.

It is an amenable number.

135666245 is a deficient number, since it is larger than the sum of its proper divisors (55595707).

135666245 is a wasteful number, since it uses less digits than its factorization.

135666245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189772.

The product of its digits is 129600, while the sum is 38.

The square root of 135666245 is about 11647.5853720846. The cubic root of 135666245 is about 513.8352980048.

The spelling of 135666245 in words is "one hundred thirty-five million, six hundred sixty-six thousand, two hundred forty-five".