65665011 has 8 divisors (see below), whose sum is σ = 87920640. Its totient is φ = 43593032.

The previous prime is 65665009. The next prime is 65665013. The reversal of 65665011 is 11056656.

It is an interprime number because it is at equal distance from previous prime (65665009) and next prime (65665013).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65665011 - 2¹ = 65665009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65665011.

It is not an unprimeable number, because it can be changed into a prime (65665013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45075 + ... + 46508.

It is an arithmetic number, because the mean of its divisors is an integer number (10990080).

Almost surely, 2^65665011 is an apocalyptic number.

65665011 is a deficient number, since it is larger than the sum of its proper divisors (22255629).

65665011 is a wasteful number, since it uses less digits than its factorization.

65665011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91825.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 65665011 is about 8103.3950292455. The cubic root of 65665011 is about 403.4391193201.

The spelling of 65665011 in words is "sixty-five million, six hundred sixty-five thousand, eleven".