660447474199 has 4 divisors (see below), whose sum is σ = 661979835360. Its totient is φ = 658915113040.

The previous prime is 660447474173. The next prime is 660447474301. The reversal of 660447474199 is 991474744066.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660447474199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660447474109) 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, 766179934 + ... + 766180795.

It is an arithmetic number, because the mean of its divisors is an integer number (165494958840).

Almost surely, 2^660447474199 is an apocalyptic number.

660447474199 is a deficient number, since it is larger than the sum of its proper divisors (1532361161).

660447474199 is a wasteful number, since it uses less digits than its factorization.

660447474199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532361160.

The product of its (nonzero) digits is 36578304, while the sum is 61.

The spelling of 660447474199 in words is "six hundred sixty billion, four hundred forty-seven million, four hundred seventy-four thousand, one hundred ninety-nine".