201466640 has 40 divisors (see below), whose sum is σ = 469577088. Its totient is φ = 80385920.

The previous prime is 201466627. The next prime is 201466649. The reversal of 201466640 is 46664102.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (201466649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31559 + ... + 37401.

Almost surely, 2^201466640 is an apocalyptic number.

201466640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201466640 is an abundant number, since it is smaller than the sum of its proper divisors (268110448).

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

201466640 is a wasteful number, since it uses less digits than its factorization.

201466640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6287 (or 6281 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 201466640 is about 14193.8944620566. The cubic root of 201466640 is about 586.2295613462.

The spelling of 201466640 in words is "two hundred one million, four hundred sixty-six thousand, six hundred forty".