52166666 has 12 divisors (see below), whose sum is σ = 82586322. Its totient is φ = 24710184.

The previous prime is 52166657. The next prime is 52166671. The reversal of 52166666 is 66666125.

It can be written as a sum of positive squares in only one way, i.e., 46526041 + 5640625 = 6821^2 + 2375^2 .

It is a super-2 number, since 2×52166666² = 5442722083111112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

52166666 is a modest number, since divided by 6666 gives 5216 as remainder.

It is a nialpdrome in base 13.

It is a zygodrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35405 + ... + 36848.

Almost surely, 2^52166666 is an apocalyptic number.

52166666 is a deficient number, since it is larger than the sum of its proper divisors (30419656).

52166666 is a wasteful number, since it uses less digits than its factorization.

52166666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72293 (or 72274 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 52166666 is about 7222.6495138557. The cubic root of 52166666 is about 373.6494613675.

The spelling of 52166666 in words is "fifty-two million, one hundred sixty-six thousand, six hundred sixty-six".