426201666 has 16 divisors (see below), whose sum is σ = 929894688. Its totient is φ = 129152000.

The previous prime is 426201649. The next prime is 426201689. The reversal of 426201666 is 666102624.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3228735 + ... + 3228866.

It is an arithmetic number, because the mean of its divisors is an integer number (58118418).

Almost surely, 2^426201666 is an apocalyptic number.

426201666 is an abundant number, since it is smaller than the sum of its proper divisors (503693022).

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

426201666 is a wasteful number, since it uses less digits than its factorization.

426201666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6457617.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 426201666 is about 20644.6522373229. The cubic root of 426201666 is about 752.5552347031. Note that the first 3 decimals are identical.

The spelling of 426201666 in words is "four hundred twenty-six million, two hundred one thousand, six hundred sixty-six".