78125166 has 48 divisors (see below), whose sum is σ = 204837984. Its totient is φ = 21007872.

The previous prime is 78125147. The next prime is 78125189. The reversal of 78125166 is 66152187.

It is a super-2 number, since 2×78125166² = 12207083125055112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78125166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16095 + ... + 20378.

It is an arithmetic number, because the mean of its divisors is an integer number (4267458).

Almost surely, 2^78125166 is an apocalyptic number.

78125166 is an abundant number, since it is smaller than the sum of its proper divisors (126712818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78125166 is a wasteful number, since it uses less digits than its factorization.

78125166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36505 (or 36502 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 78125166 is about 8838.8441552049. The cubic root of 78125166 is about 427.4942894487.

The spelling of 78125166 in words is "seventy-eight million, one hundred twenty-five thousand, one hundred sixty-six".