166258380 has 24 divisors (see below), whose sum is σ = 465523632. Its totient is φ = 44335552.

The previous prime is 166258361. The next prime is 166258381. The reversal of 166258380 is 83852661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (166258381) 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, 1385427 + ... + 1385546.

It is an arithmetic number, because the mean of its divisors is an integer number (19396818).

Almost surely, 2^166258380 is an apocalyptic number.

166258380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166258380 is an abundant number, since it is smaller than the sum of its proper divisors (299265252).

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

166258380 is a wasteful number, since it uses less digits than its factorization.

166258380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770985 (or 2770983 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 166258380 is about 12894.1219165944. The cubic root of 166258380 is about 549.8714630758.

The spelling of 166258380 in words is "one hundred sixty-six million, two hundred fifty-eight thousand, three hundred eighty".