166266420 has 48 divisors (see below), whose sum is σ = 469835520. Its totient is φ = 43929216.

The previous prime is 166266413. The next prime is 166266431. The reversal of 166266420 is 24662661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6172 + ... + 19251.

It is an arithmetic number, because the mean of its divisors is an integer number (9788240).

Almost surely, 2^166266420 is an apocalyptic number.

166266420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166266420 is an abundant number, since it is smaller than the sum of its proper divisors (303569100).

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

166266420 is a wasteful number, since it uses less digits than its factorization.

166266420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25544 (or 25542 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 166266420 is about 12894.4336827951. The cubic root of 166266420 is about 549.8803265795.

The spelling of 166266420 in words is "one hundred sixty-six million, two hundred sixty-six thousand, four hundred twenty".