166563420 has 48 divisors (see below), whose sum is σ = 467389440. Its totient is φ = 44320576.

The previous prime is 166563413. The next prime is 166563427. The reversal of 166563420 is 24365661.

166563420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166563413) and next prime (166563427).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166563427) 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, 27421 + ... + 32939.

It is an arithmetic number, because the mean of its divisors is an integer number (9737280).

Almost surely, 2^166563420 is an apocalyptic number.

166563420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166563420 is an abundant number, since it is smaller than the sum of its proper divisors (300826020).

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

166563420 is a wasteful number, since it uses less digits than its factorization.

166563420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6034 (or 6032 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 166563420 is about 12905.9451416779. The cubic root of 166563420 is about 550.2075470149.

The spelling of 166563420 in words is "one hundred sixty-six million, five hundred sixty-three thousand, four hundred twenty".