201626421066 has 48 divisors (see below), whose sum is σ = 502151405184. Its totient is φ = 57274551072.

The previous prime is 201626421049. The next prime is 201626421071. The reversal of 201626421066 is 660124626102.

201626421066 is a `hidden beast` number, since 2 + 0 + 1 + 6 + 2 + 642 + 1 + 0 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 201626421066.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4603086 + ... + 4646681.

It is an arithmetic number, because the mean of its divisors is an integer number (10461487608).

Almost surely, 2^201626421066 is an apocalyptic number.

201626421066 is an abundant number, since it is smaller than the sum of its proper divisors (300524984118).

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

201626421066 is a wasteful number, since it uses less digits than its factorization.

201626421066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9249955 (or 9249952 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 201626421066 in words is "two hundred one billion, six hundred twenty-six million, four hundred twenty-one thousand, sixty-six".