65516667 has 4 divisors (see below), whose sum is σ = 87355560. Its totient is φ = 43677776.

The previous prime is 65516663. The next prime is 65516681. The reversal of 65516667 is 76661556.

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 65516667 - 2² = 65516663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65516663) 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, 10919442 + ... + 10919447.

It is an arithmetic number, because the mean of its divisors is an integer number (21838890).

Almost surely, 2^65516667 is an apocalyptic number.

65516667 is a deficient number, since it is larger than the sum of its proper divisors (21838893).

65516667 is a wasteful number, since it uses less digits than its factorization.

65516667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21838892.

The product of its digits is 226800, while the sum is 42.

The square root of 65516667 is about 8094.2366533232. The cubic root of 65516667 is about 403.1350867977.

The spelling of 65516667 in words is "sixty-five million, five hundred sixteen thousand, six hundred sixty-seven".