201666252734 has 16 divisors (see below), whose sum is σ = 303827329728. Its totient is φ = 100390561152.

The previous prime is 201666252653. The next prime is 201666252737. The reversal of 201666252734 is 437252666102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201666252737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8103899 + ... + 8128745.

It is an arithmetic number, because the mean of its divisors is an integer number (18989208108).

Almost surely, 2^201666252734 is an apocalyptic number.

201666252734 is a deficient number, since it is larger than the sum of its proper divisors (102161076994).

201666252734 is a wasteful number, since it uses less digits than its factorization.

201666252734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42499.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 201666252734 in words is "two hundred one billion, six hundred sixty-six million, two hundred fifty-two thousand, seven hundred thirty-four".