669746913 has 32 divisors (see below), whose sum is σ = 1018801152. Its totient is φ = 387393600.

The previous prime is 669746893. The next prime is 669746923. The reversal of 669746913 is 319647966.

It is not a de Polignac number, because 669746913 - 2⁵ = 669746881 is a prime.

It is a super-3 number, since 3×669746913³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (669746923) 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, 523831 + ... + 525107.

It is an arithmetic number, because the mean of its divisors is an integer number (31837536).

Almost surely, 2^669746913 is an apocalyptic number.

It is an amenable number.

669746913 is a deficient number, since it is larger than the sum of its proper divisors (349054239).

669746913 is a wasteful number, since it uses less digits than its factorization.

669746913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005.

The product of its digits is 1469664, while the sum is 51.

The square root of 669746913 is about 25879.4689474108. The cubic root of 669746913 is about 874.9238194357.

The spelling of 669746913 in words is "six hundred sixty-nine million, seven hundred forty-six thousand, nine hundred thirteen".