166146780 has 48 divisors (see below), whose sum is σ = 492579360. Its totient is φ = 41699328.

The previous prime is 166146769. The next prime is 166146787. The reversal of 166146780 is 87641661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166146787) 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, 80425 + ... + 82464.

It is an arithmetic number, because the mean of its divisors is an integer number (10262070).

Almost surely, 2^166146780 is an apocalyptic number.

166146780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166146780 is an abundant number, since it is smaller than the sum of its proper divisors (326432580).

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

166146780 is a wasteful number, since it uses less digits than its factorization.

166146780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162918 (or 162916 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 166146780 is about 12889.7936368276. The cubic root of 166146780 is about 549.7484028309.

The spelling of 166146780 in words is "one hundred sixty-six million, one hundred forty-six thousand, seven hundred eighty".