669528940 has 12 divisors (see below), whose sum is σ = 1406010816. Its totient is φ = 267811568.

The previous prime is 669528931. The next prime is 669528941. The reversal of 669528940 is 49825966.

It is not an unprimeable number, because it can be changed into a prime (669528941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16738204 + ... + 16738243.

It is an arithmetic number, because the mean of its divisors is an integer number (117167568).

Almost surely, 2^669528940 is an apocalyptic number.

It is an amenable number.

669528940 is an abundant number, since it is smaller than the sum of its proper divisors (736481876).

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

669528940 is a wasteful number, since it uses less digits than its factorization.

669528940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33476456 (or 33476454 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The square root of 669528940 is about 25875.2572934068. The cubic root of 669528940 is about 874.8288928005.

The spelling of 669528940 in words is "six hundred sixty-nine million, five hundred twenty-eight thousand, nine hundred forty".