40566021 has 8 divisors (see below), whose sum is σ = 54895584. Its totient is φ = 26640240.

The previous prime is 40566013. The next prime is 40566047. The reversal of 40566021 is 12066504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40566021 - 2³ = 40566013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40565982 and 40566000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40566061) 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, 100710 + ... + 101111.

It is an arithmetic number, because the mean of its divisors is an integer number (6861948).

Almost surely, 2^40566021 is an apocalyptic number.

It is an amenable number.

40566021 is a deficient number, since it is larger than the sum of its proper divisors (14329563).

40566021 is a wasteful number, since it uses less digits than its factorization.

40566021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201891.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 40566021 is about 6369.1460181095. The cubic root of 40566021 is about 343.6007768399.

The spelling of 40566021 in words is "forty million, five hundred sixty-six thousand, twenty-one".