164278660 has 48 divisors (see below), whose sum is σ = 424601856. Its totient is φ = 51990912.

The previous prime is 164278651. The next prime is 164278661. The reversal of 164278660 is 66872461.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (164278661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43312 + ... + 46951.

It is an arithmetic number, because the mean of its divisors is an integer number (8845872).

Almost surely, 2^164278660 is an apocalyptic number.

164278660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164278660 is an abundant number, since it is smaller than the sum of its proper divisors (260323196).

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

164278660 is a wasteful number, since it uses less digits than its factorization.

164278660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90292 (or 90290 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 164278660 is about 12817.1237022976. The cubic root of 164278660 is about 547.6802128410.

The spelling of 164278660 in words is "one hundred sixty-four million, two hundred seventy-eight thousand, six hundred sixty".