40766921 has 8 divisors (see below), whose sum is σ = 44065224. Its totient is φ = 37491840.

The previous prime is 40766917. The next prime is 40766977. The reversal of 40766921 is 12966704.

40766921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2190400 + 38576521 = 1480^2 + 6211^2 .

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 40766921 - 2² = 40766917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40766321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2060 + ... + 9261.

It is an arithmetic number, because the mean of its divisors is an integer number (5508153).

Almost surely, 2^40766921 is an apocalyptic number.

It is an amenable number.

40766921 is a deficient number, since it is larger than the sum of its proper divisors (3298303).

40766921 is a wasteful number, since it uses less digits than its factorization.

40766921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11611.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 40766921 is about 6384.8978848530. The cubic root of 40766921 is about 344.1670615667.

The spelling of 40766921 in words is "forty million, seven hundred sixty-six thousand, nine hundred twenty-one".