201012660 has 72 divisors (see below), whose sum is σ = 610960896. Its totient is φ = 53496000.

The previous prime is 201012653. The next prime is 201012667. The reversal of 201012660 is 66210102.

It is a happy number.

201012660 is a `hidden beast` number, since 2 + 0 + 1 + 0 + 1 + 2 + 660 = 666.

It is an interprime number because it is at equal distance from previous prime (201012653) and next prime (201012667).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201012667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134437 + ... + 135923.

It is an arithmetic number, because the mean of its divisors is an integer number (8485568).

Almost surely, 2^201012660 is an apocalyptic number.

201012660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201012660 is an abundant number, since it is smaller than the sum of its proper divisors (409948236).

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

201012660 is a wasteful number, since it uses less digits than its factorization.

201012660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253 (or 2248 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 201012660 is about 14177.8933555024. The cubic root of 201012660 is about 585.7888984012.

Adding to 201012660 its reverse (66210102), we get a palindrome (267222762).

The spelling of 201012660 in words is "two hundred one million, twelve thousand, six hundred sixty".