665136035 has 4 divisors (see below), whose sum is σ = 798163248. Its totient is φ = 532108824.

The previous prime is 665135981. The next prime is 665136037. The reversal of 665136035 is 530631566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 665136035 - 2¹⁰ = 665135011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665135986 and 665136004.

It is not an unprimeable number, because it can be changed into a prime (665136037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66513599 + ... + 66513608.

It is an arithmetic number, because the mean of its divisors is an integer number (199540812).

Almost surely, 2^665136035 is an apocalyptic number.

665136035 is a deficient number, since it is larger than the sum of its proper divisors (133027213).

665136035 is a wasteful number, since it uses less digits than its factorization.

665136035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133027212.

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 665136035 is about 25790.2313870969. The cubic root of 665136035 is about 872.9113874580.

The spelling of 665136035 in words is "six hundred sixty-five million, one hundred thirty-six thousand, thirty-five".