665145033 has 16 divisors (see below), whose sum is σ = 1021295616. Its totient is φ = 377179920.

The previous prime is 665145031. The next prime is 665145049. The reversal of 665145033 is 330541566.

It is not a de Polignac number, because 665145033 - 2¹ = 665145031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665144985 and 665145003.

It is not an unprimeable number, because it can be changed into a prime (665145031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118141 + ... + 123642.

It is an arithmetic number, because the mean of its divisors is an integer number (63830976).

Almost surely, 2^665145033 is an apocalyptic number.

It is an amenable number.

665145033 is a deficient number, since it is larger than the sum of its proper divisors (356150583).

665145033 is a wasteful number, since it uses less digits than its factorization.

665145033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241924.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 665145033 is about 25790.4058324021. The cubic root of 665145033 is about 872.9153237060.

Adding to 665145033 its reverse (330541566), we get a palindrome (995686599).

The spelling of 665145033 in words is "six hundred sixty-five million, one hundred forty-five thousand, thirty-three".