666850047 has 8 divisors (see below), whose sum is σ = 889811760. Its totient is φ = 444227520.

The previous prime is 666850043. The next prime is 666850069. The reversal of 666850047 is 740058666.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 666850047 - 2² = 666850043 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 666849990 and 666850008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666850043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80172 + ... + 88097.

It is an arithmetic number, because the mean of its divisors is an integer number (111226470).

Almost surely, 2^666850047 is an apocalyptic number.

666850047 is a deficient number, since it is larger than the sum of its proper divisors (222961713).

666850047 is a wasteful number, since it uses less digits than its factorization.

666850047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169593.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 666850047 is about 25823.4398754310. The cubic root of 666850047 is about 873.6605561316.

The spelling of 666850047 in words is "six hundred sixty-six million, eight hundred fifty thousand, forty-seven".