665148900 has 72 divisors (see below), whose sum is σ = 2072547904. Its totient is φ = 163728000.

The previous prime is 665148899. The next prime is 665148907. The reversal of 665148900 is 9841566.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (665148907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81376 + ... + 89175.

Almost surely, 2^665148900 is an apocalyptic number.

665148900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

665148900 is an abundant number, since it is smaller than the sum of its proper divisors (1407399004).

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

665148900 is a wasteful number, since it uses less digits than its factorization.

665148900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170581 (or 170574 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 665148900 is about 25790.4808020324. The cubic root of 665148900 is about 872.9170153456.

The spelling of 665148900 in words is "six hundred sixty-five million, one hundred forty-eight thousand, nine hundred".