40665880 has 32 divisors (see below), whose sum is σ = 92534400. Its totient is φ = 16082176.

The previous prime is 40665869. The next prime is 40665883. The reversal of 40665880 is 8856604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40665883) 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, 2152 + ... + 9271.

It is an arithmetic number, because the mean of its divisors is an integer number (2891700).

Almost surely, 2^40665880 is an apocalyptic number.

40665880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40665880 is an abundant number, since it is smaller than the sum of its proper divisors (51868520).

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

40665880 is a wasteful number, since it uses less digits than its factorization.

40665880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11523 (or 11519 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 40665880 is about 6376.9804766833. The cubic root of 40665880 is about 343.8824864518.

The spelling of 40665880 in words is "forty million, six hundred sixty-five thousand, eight hundred eighty".