669659770 has 64 divisors (see below), whose sum is σ = 1339680384. Its totient is φ = 239466240.

The previous prime is 669659759. The next prime is 669659779. The reversal of 669659770 is 77956966.

It is not an unprimeable number, because it can be changed into a prime (669659779) 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 31 ways as a sum of consecutive naturals, for example, 571285 + ... + 572455.

It is an arithmetic number, because the mean of its divisors is an integer number (20932506).

Almost surely, 2^669659770 is an apocalyptic number.

669659770 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

669659770 is a wasteful number, since it uses less digits than its factorization.

669659770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327.

The product of its (nonzero) digits is 4286520, while the sum is 55.

The square root of 669659770 is about 25877.7852607212. The cubic root of 669659770 is about 874.8858713730.

It can be divided in two parts, 6696 and 59770, that added together give a palindrome (66466).

The spelling of 669659770 in words is "six hundred sixty-nine million, six hundred fifty-nine thousand, seven hundred seventy".