669101144 has 8 divisors (see below), whose sum is σ = 1254564660. Its totient is φ = 334550568.

The previous prime is 669101143. The next prime is 669101161. The reversal of 669101144 is 441101966.

It is a happy number.

669101144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 669101144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669101141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41818814 + ... + 41818829.

Almost surely, 2^669101144 is an apocalyptic number.

It is an amenable number.

669101144 is a deficient number, since it is larger than the sum of its proper divisors (585463516).

669101144 is a wasteful number, since it uses less digits than its factorization.

669101144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83637649 (or 83637645 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 669101144 is about 25866.9894653398. The cubic root of 669101144 is about 874.6425289180.

The spelling of 669101144 in words is "six hundred sixty-nine million, one hundred one thousand, one hundred forty-four".