166800513623266 has 16 divisors (see below), whose sum is σ = 258501653758656. Its totient is φ = 80660290446576.

The previous prime is 166800513623251. The next prime is 166800513623287. The reversal of 166800513623266 is 662326315008661.

166800513623266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166800513623266² (a number of 29 digits) contains 22 as substring.

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, 6748673256 + ... + 6748697971.

It is an arithmetic number, because the mean of its divisors is an integer number (16156353359916).

Almost surely, 2^{166800513623266} is an apocalyptic number.

166800513623266 is a deficient number, since it is larger than the sum of its proper divisors (91701140135390).

166800513623266 is a wasteful number, since it uses less digits than its factorization.

166800513623266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13497371433.

The product of its (nonzero) digits is 11197440, while the sum is 55.

The spelling of 166800513623266 in words is "one hundred sixty-six trillion, eight hundred billion, five hundred thirteen million, six hundred twenty-three thousand, two hundred sixty-six".