669737043 has 24 divisors (see below), whose sum is σ = 981266832. Its totient is φ = 440115648.

The previous prime is 669737041. The next prime is 669737053. The reversal of 669737043 is 340737966.

It is not a de Polignac number, because 669737043 - 2¹ = 669737041 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 669737043.

It is not an unprimeable number, because it can be changed into a prime (669737041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 487105 + ... + 488477.

It is an arithmetic number, because the mean of its divisors is an integer number (40886118).

Almost surely, 2^669737043 is an apocalyptic number.

669737043 is a deficient number, since it is larger than the sum of its proper divisors (311529789).

669737043 is a wasteful number, since it uses less digits than its factorization.

669737043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2115 (or 2112 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 45.

The square root of 669737043 is about 25879.2782550055. The cubic root of 669737043 is about 874.9195215234.

The spelling of 669737043 in words is "six hundred sixty-nine million, seven hundred thirty-seven thousand, forty-three".