21660550266514 has 32 divisors (see below), whose sum is σ = 32739841987776. Its totient is φ = 10747634688000.

The previous prime is 21660550266497. The next prime is 21660550266539. The reversal of 21660550266514 is 41566205506612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225881682 + ... + 225977554.

It is an arithmetic number, because the mean of its divisors is an integer number (1023120062118).

Almost surely, 2^{21660550266514} is an apocalyptic number.

21660550266514 is a deficient number, since it is larger than the sum of its proper divisors (11079291721262).

21660550266514 is a wasteful number, since it uses less digits than its factorization.

21660550266514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97770.

The product of its (nonzero) digits is 2592000, while the sum is 49.

The spelling of 21660550266514 in words is "twenty-one trillion, six hundred sixty billion, five hundred fifty million, two hundred sixty-six thousand, five hundred fourteen".