66200919 has 4 divisors (see below), whose sum is σ = 88267896. Its totient is φ = 44133944.

The previous prime is 66200899. The next prime is 66200929. The reversal of 66200919 is 91900266.

It is a happy number.

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 66200919 - 2⁸ = 66200663 is a prime.

It is a super-2 number, since 2×66200919² = 8765123352889122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66200919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66200929) 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, 11033484 + ... + 11033489.

It is an arithmetic number, because the mean of its divisors is an integer number (22066974).

Almost surely, 2^66200919 is an apocalyptic number.

66200919 is a deficient number, since it is larger than the sum of its proper divisors (22066977).

66200919 is a wasteful number, since it uses less digits than its factorization.

66200919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22066976.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 66200919 is about 8136.3947175638. The cubic root of 66200919 is about 404.5336684067.

The spelling of 66200919 in words is "sixty-six million, two hundred thousand, nine hundred nineteen".