669544735 has 8 divisors (see below), whose sum is σ = 815445936. Its totient is φ = 527640960.

The previous prime is 669544709. The next prime is 669544739. The reversal of 669544735 is 537445966.

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 669544735 - 2⁵ = 669544703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669544739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 998986 + ... + 999655.

It is an arithmetic number, because the mean of its divisors is an integer number (101930742).

Almost surely, 2^669544735 is an apocalyptic number.

669544735 is a deficient number, since it is larger than the sum of its proper divisors (145901201).

669544735 is a wasteful number, since it uses less digits than its factorization.

669544735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998713.

The product of its digits is 2721600, while the sum is 49.

The square root of 669544735 is about 25875.5625059630. The cubic root of 669544735 is about 874.8357721714.

The spelling of 669544735 in words is "six hundred sixty-nine million, five hundred forty-four thousand, seven hundred thirty-five".