678260166 has 16 divisors (see below), whose sum is σ = 1356776688. Its totient is φ = 226044000.

The previous prime is 678260161. The next prime is 678260213. The reversal of 678260166 is 661062876.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678260161) 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, 52116 + ... + 63816.

It is an arithmetic number, because the mean of its divisors is an integer number (84798543).

Almost surely, 2^678260166 is an apocalyptic number.

678260166 is an abundant number, since it is smaller than the sum of its proper divisors (678516522).

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

678260166 is a wasteful number, since it uses less digits than its factorization.

678260166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21367.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 678260166 is about 26043.4284609381. The cubic root of 678260166 is about 878.6153180382.

The spelling of 678260166 in words is "six hundred seventy-eight million, two hundred sixty thousand, one hundred sixty-six".