669740043 has 16 divisors (see below), whose sum is σ = 1045449216. Its totient is φ = 373373760.

The previous prime is 669740021. The next prime is 669740047. The reversal of 669740043 is 340047966.

It is not a de Polignac number, because 669740043 - 2⁶ = 669739979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 669739983 and 669740010.

It is not an unprimeable number, because it can be changed into a prime (669740047) 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 15 ways as a sum of consecutive naturals, for example, 388071 + ... + 389792.

It is an arithmetic number, because the mean of its divisors is an integer number (65340576).

Almost surely, 2^669740043 is an apocalyptic number.

669740043 is a deficient number, since it is larger than the sum of its proper divisors (375709173).

669740043 is a wasteful number, since it uses less digits than its factorization.

669740043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777914.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 669740043 is about 25879.3362163715. The cubic root of 669740043 is about 874.9208278842.

The spelling of 669740043 in words is "six hundred sixty-nine million, seven hundred forty thousand, forty-three".