65135566 has 16 divisors (see below), whose sum is σ = 102009600. Its totient is φ = 31153248.

The previous prime is 65135549. The next prime is 65135599. The reversal of 65135566 is 66553156.

It is a happy number.

It is a congruent number.

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, 1171 + ... + 11473.

It is an arithmetic number, because the mean of its divisors is an integer number (6375600).

Almost surely, 2^65135566 is an apocalyptic number.

65135566 is a deficient number, since it is larger than the sum of its proper divisors (36874034).

65135566 is a wasteful number, since it uses less digits than its factorization.

65135566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10443.

The product of its digits is 81000, while the sum is 37.

The square root of 65135566 is about 8070.6608155714. The cubic root of 65135566 is about 402.3519067337.

The spelling of 65135566 in words is "sixty-five million, one hundred thirty-five thousand, five hundred sixty-six".