669509963 has 8 divisors (see below), whose sum is σ = 712256400. Its totient is φ = 627137280.

The previous prime is 669509959. The next prime is 669509999. The reversal of 669509963 is 369905966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 669509963 - 2² = 669509959 is a prime.

It is a super-2 number, since 2×669509963² = 896487181112522738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669509923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89738 + ... + 96911.

It is an arithmetic number, because the mean of its divisors is an integer number (89032050).

Almost surely, 2^669509963 is an apocalyptic number.

669509963 is a deficient number, since it is larger than the sum of its proper divisors (42746437).

669509963 is a wasteful number, since it uses less digits than its factorization.

669509963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186877.

The product of its (nonzero) digits is 2361960, while the sum is 53.

The square root of 669509963 is about 25874.8905891407. The cubic root of 669509963 is about 874.8206273949.

The spelling of 669509963 in words is "six hundred sixty-nine million, five hundred nine thousand, nine hundred sixty-three".