684870166 has 16 divisors (see below), whose sum is σ = 1061665920. Its totient is φ = 331007040.

The previous prime is 684870163. The next prime is 684870239. The reversal of 684870166 is 661078486.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684870163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52200 + ... + 63988.

It is an arithmetic number, because the mean of its divisors is an integer number (66354120).

Almost surely, 2^684870166 is an apocalyptic number.

684870166 is a deficient number, since it is larger than the sum of its proper divisors (376795754).

684870166 is a wasteful number, since it uses less digits than its factorization.

684870166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12759.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 684870166 is about 26170.0241879904. The cubic root of 684870166 is about 881.4602846365.

The spelling of 684870166 in words is "six hundred eighty-four million, eight hundred seventy thousand, one hundred sixty-six".