669148269 has 8 divisors (see below), whose sum is σ = 930988992. Its totient is φ = 426703200.

The previous prime is 669148261. The next prime is 669148279. The reversal of 669148269 is 962841966.

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

It is not a de Polignac number, because 669148269 - 2³ = 669148261 is a prime.

It is a super-2 number, since 2×669148269² = 895518811811392722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669148261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4848832 + ... + 4848969.

It is an arithmetic number, because the mean of its divisors is an integer number (116373624).

Almost surely, 2^669148269 is an apocalyptic number.

669148269 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

669148269 is a deficient number, since it is larger than the sum of its proper divisors (261840723).

669148269 is a wasteful number, since it uses less digits than its factorization.

669148269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9697827.

The product of its digits is 1119744, while the sum is 51.

The square root of 669148269 is about 25867.9003593256. The cubic root of 669148269 is about 874.6630622170.

The spelling of 669148269 in words is "six hundred sixty-nine million, one hundred forty-eight thousand, two hundred sixty-nine".