201660426000 has 960 divisors, whose sum is σ = 820526982912. Its totient is φ = 45619200000.

The previous prime is 201660425963. The next prime is 201660426013. The reversal of 201660426000 is 624066102.

It is a happy number.

201660426000 is a `hidden beast` number, since 2 + 0 + 16 + 6 + 0 + 42 + 600 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 609245835 + ... + 609246165.

Almost surely, 2^201660426000 is an apocalyptic number.

201660426000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201660426000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410263491456).

201660426000 is an abundant number, since it is smaller than the sum of its proper divisors (618866556912).

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

201660426000 is a wasteful number, since it uses less digits than its factorization.

201660426000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The spelling of 201660426000 in words is "two hundred one billion, six hundred sixty million, four hundred twenty-six thousand".