669128153 has 4 divisors (see below), whose sum is σ = 672050340. Its totient is φ = 666205968.

The previous prime is 669128137. The next prime is 669128227. The reversal of 669128153 is 351821966.

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

It can be written as a sum of positive squares in 2 ways, for example, as 258984649 + 410143504 = 16093^2 + 20252^2 .

It is a cyclic number.

It is not a de Polignac number, because 669128153 - 2⁴ = 669128137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 669128153.

It is not an unprimeable number, because it can be changed into a prime (669128113) 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, 1460750 + ... + 1461207.

It is an arithmetic number, because the mean of its divisors is an integer number (168012585).

Almost surely, 2^669128153 is an apocalyptic number.

It is an amenable number.

669128153 is a deficient number, since it is larger than the sum of its proper divisors (2922187).

669128153 is a wasteful number, since it uses less digits than its factorization.

669128153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922186.

The product of its digits is 77760, while the sum is 41.

The square root of 669128153 is about 25867.5115347418. The cubic root of 669128153 is about 874.6542973940.

It can be divided in two parts, 66 and 9128153, that added together give a palindrome (9128219).

The spelling of 669128153 in words is "six hundred sixty-nine million, one hundred twenty-eight thousand, one hundred fifty-three".