669187152 has 30 divisors (see below), whose sum is σ = 1872795002. Its totient is φ = 223062336.

The previous prime is 669187109. The next prime is 669187157. The reversal of 669187152 is 251781966.

It can be written as a sum of positive squares in only one way, i.e., 417139776 + 252047376 = 20424^2 + 15876^2 .

It is a super-2 number, since 2×669187152² = 895622888803742208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 669187098 and 669187107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669187157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2323423 + ... + 2323710.

Almost surely, 2^669187152 is an apocalyptic number.

It is an amenable number.

669187152 is an abundant number, since it is smaller than the sum of its proper divisors (1203607850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669187152 is a wasteful number, since it uses less digits than its factorization.

669187152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4647147 (or 4647138 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 669187152 is about 25868.6519169438. The cubic root of 669187152 is about 874.6800035870.

The spelling of 669187152 in words is "six hundred sixty-nine million, one hundred eighty-seven thousand, one hundred fifty-two".