166625401223366 has 32 divisors (see below), whose sum is σ = 252843197967360. Its totient is φ = 82346632010496.

The previous prime is 166625401223317. The next prime is 166625401223383. The reversal of 166625401223366 is 663322104526661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515836055 + ... + 516158973.

It is an arithmetic number, because the mean of its divisors is an integer number (7901349936480).

Almost surely, 2^{166625401223366} is an apocalyptic number.

166625401223366 is a deficient number, since it is larger than the sum of its proper divisors (86217796743994).

166625401223366 is a wasteful number, since it uses less digits than its factorization.

166625401223366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326468.

The product of its (nonzero) digits is 11197440, while the sum is 53.

The spelling of 166625401223366 in words is "one hundred sixty-six trillion, six hundred twenty-five billion, four hundred one million, two hundred twenty-three thousand, three hundred sixty-six".