40566645 has 48 divisors (see below), whose sum is σ = 81319680. Its totient is φ = 18323712.

The previous prime is 40566637. The next prime is 40566683. The reversal of 40566645 is 54666504.

It is a happy number.

It is not a de Polignac number, because 40566645 - 2³ = 40566637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27312 + ... + 28758.

It is an arithmetic number, because the mean of its divisors is an integer number (1694160).

Almost surely, 2^40566645 is an apocalyptic number.

40566645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40566645 is an abundant number, since it is smaller than the sum of its proper divisors (40753035).

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

40566645 is a wasteful number, since it uses less digits than its factorization.

40566645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554 (or 1551 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 40566645 is about 6369.1950040802. The cubic root of 40566645 is about 343.6025386246.

It can be divided in two parts, 4056 and 6645, that added together give a palindrome (10701).

The spelling of 40566645 in words is "forty million, five hundred sixty-six thousand, six hundred forty-five".