40065851 has 8 divisors (see below), whose sum is σ = 48199680. Its totient is φ = 32534568.

The previous prime is 40065841. The next prime is 40065859. The reversal of 40065851 is 15856004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40065851 - 2¹⁸ = 39803707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40065859) 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, 150491 + ... + 150756.

It is an arithmetic number, because the mean of its divisors is an integer number (6024960).

Almost surely, 2^40065851 is an apocalyptic number.

40065851 is a deficient number, since it is larger than the sum of its proper divisors (8133829).

40065851 is a wasteful number, since it uses less digits than its factorization.

40065851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301273.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 40065851 is about 6329.7591581355. The cubic root of 40065851 is about 342.1827591526.

The spelling of 40065851 in words is "forty million, sixty-five thousand, eight hundred fifty-one".