665933047 has 8 divisors (see below), whose sum is σ = 718454016. Its totient is φ = 613597152.

The previous prime is 665933039. The next prime is 665933063. The reversal of 665933047 is 740339566.

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 665933047 - 2³ = 665933039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665932994 and 665933012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665933347) 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, 38743 + ... + 53224.

It is an arithmetic number, because the mean of its divisors is an integer number (89806752).

Almost surely, 2^665933047 is an apocalyptic number.

665933047 is a deficient number, since it is larger than the sum of its proper divisors (52520969).

665933047 is a wasteful number, since it uses less digits than its factorization.

665933047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92537.

The product of its (nonzero) digits is 408240, while the sum is 43.

The square root of 665933047 is about 25805.6785804985. The cubic root of 665933047 is about 873.2599092199.

The spelling of 665933047 in words is "six hundred sixty-five million, nine hundred thirty-three thousand, forty-seven".