266220542 has 16 divisors (see below), whose sum is σ = 460419552. Its totient is φ = 113084160.

The previous prime is 266220509. The next prime is 266220557. The reversal of 266220542 is 245022662.

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, 82559 + ... + 85722.

It is an arithmetic number, because the mean of its divisors is an integer number (28776222).

Almost surely, 2^266220542 is an apocalyptic number.

266220542 is a deficient number, since it is larger than the sum of its proper divisors (194199010).

266220542 is a wasteful number, since it uses less digits than its factorization.

266220542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168403.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 266220542 is about 16316.2661782652. The cubic root of 266220542 is about 643.3004488607.

The spelling of 266220542 in words is "two hundred sixty-six million, two hundred twenty thousand, five hundred forty-two".