4066540 has 24 divisors (see below), whose sum is σ = 8612352. Its totient is φ = 1612800.

The previous prime is 4066537. The next prime is 4066567. The reversal of 4066540 is 456604.

It is a happy number.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1740 + ... + 3340.

It is an arithmetic number, because the mean of its divisors is an integer number (358848).

Almost surely, 2^4066540 is an apocalyptic number.

It is an amenable number.

4066540 is an abundant number, since it is smaller than the sum of its proper divisors (4545812).

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

4066540 is a wasteful number, since it uses less digits than its factorization.

4066540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737 (or 1735 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 4066540 is about 2016.5663886914. The cubic root of 4066540 is about 159.6154829065.

The spelling of 4066540 in words is "four million, sixty-six thousand, five hundred forty".