65669699 has 4 divisors (see below), whose sum is σ = 65735040. Its totient is φ = 65604360.

The previous prime is 65669663. The next prime is 65669713. The reversal of 65669699 is 99696656.

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 65669699 - 2¹⁶ = 65604163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65669099) 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, 31139 + ... + 33180.

It is an arithmetic number, because the mean of its divisors is an integer number (16433760).

Almost surely, 2^65669699 is an apocalyptic number.

65669699 is a deficient number, since it is larger than the sum of its proper divisors (65341).

65669699 is a wasteful number, since it uses less digits than its factorization.

65669699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65340.

The product of its digits is 4723920, while the sum is 56.

The square root of 65669699 is about 8103.6842855580. The cubic root of 65669699 is about 403.4487199560.

The spelling of 65669699 in words is "sixty-five million, six hundred sixty-nine thousand, six hundred ninety-nine".