40659966 has 24 divisors (see below), whose sum is σ = 90479064. Its totient is φ = 13186800.

The previous prime is 40659961. The next prime is 40659973. The reversal of 40659966 is 66995604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40659961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29860 + ... + 31191.

It is an arithmetic number, because the mean of its divisors is an integer number (3769961).

Almost surely, 2^40659966 is an apocalyptic number.

40659966 is an abundant number, since it is smaller than the sum of its proper divisors (49819098).

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

40659966 is a wasteful number, since it uses less digits than its factorization.

40659966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61096 (or 61093 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 40659966 is about 6376.5167607401. The cubic root of 40659966 is about 343.8658154767.

The spelling of 40659966 in words is "forty million, six hundred fifty-nine thousand, nine hundred sixty-six".