40065646 has 8 divisors (see below), whose sum is σ = 62170920. Its totient is φ = 19342008.

The previous prime is 40065631. The next prime is 40065659. The reversal of 40065646 is 64656004.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345336 + ... + 345451.

It is an arithmetic number, because the mean of its divisors is an integer number (7771365).

Almost surely, 2^40065646 is an apocalyptic number.

40065646 is a deficient number, since it is larger than the sum of its proper divisors (22105274).

40065646 is a wasteful number, since it uses less digits than its factorization.

40065646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690818.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 40065646 is about 6329.7429647656. The cubic root of 40065646 is about 342.1821755501.

The spelling of 40065646 in words is "forty million, sixty-five thousand, six hundred forty-six".