166254420 has 24 divisors (see below), whose sum is σ = 465512544. Its totient is φ = 44334496.

The previous prime is 166254409. The next prime is 166254421. The reversal of 166254420 is 24452661.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166254421) 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, 1385394 + ... + 1385513.

It is an arithmetic number, because the mean of its divisors is an integer number (19396356).

Almost surely, 2^166254420 is an apocalyptic number.

166254420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166254420 is an abundant number, since it is smaller than the sum of its proper divisors (299258124).

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

166254420 is a wasteful number, since it uses less digits than its factorization.

166254420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770919 (or 2770917 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 166254420 is about 12893.9683573367. The cubic root of 166254420 is about 549.8670973644.

The spelling of 166254420 in words is "one hundred sixty-six million, two hundred fifty-four thousand, four hundred twenty".