669632032 has 24 divisors (see below), whose sum is σ = 1318914576. Its totient is φ = 334669632.

The previous prime is 669632009. The next prime is 669632063. The reversal of 669632032 is 230236966.

It is a junction number, because it is equal to n+sod(n) for n = 669631982 and 669632000.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141903 + ... + 146545.

It is an arithmetic number, because the mean of its divisors is an integer number (54954774).

Almost surely, 2^669632032 is an apocalyptic number.

It is an amenable number.

669632032 is a deficient number, since it is larger than the sum of its proper divisors (649282544).

669632032 is a wasteful number, since it uses less digits than its factorization.

669632032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9160 (or 9152 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 669632032 is about 25877.2493128617. The cubic root of 669632032 is about 874.8737916472.

Adding to 669632032 its reverse (230236966), we get a palindrome (899868998).

The spelling of 669632032 in words is "six hundred sixty-nine million, six hundred thirty-two thousand, thirty-two".