65990199 has 8 divisors (see below), whose sum is σ = 95985792. Its totient is φ = 39994040.

The previous prime is 65990161. The next prime is 65990213. The reversal of 65990199 is 99109956.

It is a happy number.

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 65990199 - 2⁸ = 65989943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65990149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 999819 + ... + 999884.

It is an arithmetic number, because the mean of its divisors is an integer number (11998224).

Almost surely, 2^65990199 is an apocalyptic number.

65990199 is a deficient number, since it is larger than the sum of its proper divisors (29995593).

65990199 is a wasteful number, since it uses less digits than its factorization.

65990199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999717.

The product of its (nonzero) digits is 196830, while the sum is 48.

The square root of 65990199 is about 8123.4351723886. The cubic root of 65990199 is about 404.1039969338.

The spelling of 65990199 in words is "sixty-five million, nine hundred ninety thousand, one hundred ninety-nine".