21267160525066 has 16 divisors (see below), whose sum is σ = 32409668168640. Its totient is φ = 10465162657920.

The previous prime is 21267160525031. The next prime is 21267160525073. The reversal of 21267160525066 is 66052506176212.

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, 306179070 + ... + 306248521.

It is an arithmetic number, because the mean of its divisors is an integer number (2025604260540).

Almost surely, 2^{21267160525066} is an apocalyptic number.

21267160525066 is a deficient number, since it is larger than the sum of its proper divisors (11142507643574).

21267160525066 is a wasteful number, since it uses less digits than its factorization.

21267160525066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612427869.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 21267160525066 in words is "twenty-one trillion, two hundred sixty-seven billion, one hundred sixty million, five hundred twenty-five thousand, sixty-six".