166650266390 has 16 divisors (see below), whose sum is σ = 310314289680. Its totient is φ = 64361482080.

The previous prime is 166650266383. The next prime is 166650266423. The reversal of 166650266390 is 93662056661.

It is a super-2 number, since 2×166650266390² (a number of 23 digits) contains 22 as substring.

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, 287327756 + ... + 287328335.

It is an arithmetic number, because the mean of its divisors is an integer number (19394643105).

Almost surely, 2^166650266390 is an apocalyptic number.

166650266390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166650266390 is a deficient number, since it is larger than the sum of its proper divisors (143664023290).

166650266390 is a wasteful number, since it uses less digits than its factorization.

166650266390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574656127.

The product of its (nonzero) digits is 2099520, while the sum is 50.

The spelling of 166650266390 in words is "one hundred sixty-six billion, six hundred fifty million, two hundred sixty-six thousand, three hundred ninety".