208666534 has 16 divisors (see below), whose sum is σ = 345822048. Its totient is φ = 93926272.

The previous prime is 208666529. The next prime is 208666541. The reversal of 208666534 is 435666802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132637 + ... + 134200.

It is an arithmetic number, because the mean of its divisors is an integer number (21613878).

Almost surely, 2^208666534 is an apocalyptic number.

208666534 is a deficient number, since it is larger than the sum of its proper divisors (137155514).

208666534 is a wasteful number, since it uses less digits than its factorization.

208666534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266879.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 208666534 is about 14445.2945279769. The cubic root of 208666534 is about 593.1314248678.

The spelling of 208666534 in words is "two hundred eight million, six hundred sixty-six thousand, five hundred thirty-four".