166270780 has 48 divisors (see below), whose sum is σ = 379542240. Its totient is φ = 60818688.

The previous prime is 166270777. The next prime is 166270789. The reversal of 166270780 is 87072661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166270789) 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, 25407 + ... + 31273.

It is an arithmetic number, because the mean of its divisors is an integer number (7907130).

Almost surely, 2^166270780 is an apocalyptic number.

166270780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166270780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189771120).

166270780 is an abundant number, since it is smaller than the sum of its proper divisors (213271460).

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

166270780 is a wasteful number, since it uses less digits than its factorization.

166270780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5998 (or 5996 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 166270780 is about 12894.6027468860. The cubic root of 166270780 is about 549.8851330366.

The spelling of 166270780 in words is "one hundred sixty-six million, two hundred seventy thousand, seven hundred eighty".