166426540 has 36 divisors (see below), whose sum is σ = 406558656. Its totient is φ = 57060192.

The previous prime is 166426511. The next prime is 166426553. The reversal of 166426540 is 45624661.

It is a junction number, because it is equal to n+sod(n) for n = 166426496 and 166426505.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83932 + ... + 85891.

It is an arithmetic number, because the mean of its divisors is an integer number (11293296).

Almost surely, 2^166426540 is an apocalyptic number.

166426540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166426540 is an abundant number, since it is smaller than the sum of its proper divisors (240132116).

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

166426540 is a wasteful number, since it uses less digits than its factorization.

166426540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169846 (or 169837 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 166426540 is about 12900.6410693423. The cubic root of 166426540 is about 550.0567875249.

The spelling of 166426540 in words is "one hundred sixty-six million, four hundred twenty-six thousand, five hundred forty".