40666671 has 32 divisors (see below), whose sum is σ = 62899200. Its totient is φ = 25935840.

The previous prime is 40666657. The next prime is 40666697. The reversal of 40666671 is 17666604.

40666671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

40666671 is a nontrivial binomial coefficient, being equal to C(9019, 2).

It is not a de Polignac number, because 40666671 - 2⁶ = 40666607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40666271) 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 31 ways as a sum of consecutive naturals, for example, 130606 + ... + 130916.

It is an arithmetic number, because the mean of its divisors is an integer number (1965600).

Almost surely, 2^40666671 is an apocalyptic number.

40666671 is the 9018-th triangular number.

40666671 is a deficient number, since it is larger than the sum of its proper divisors (22232529).

40666671 is a wasteful number, since it uses less digits than its factorization.

40666671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 40666671 is about 6377.0424963301. The cubic root of 40666671 is about 343.8847160792.

The spelling of 40666671 in words is "forty million, six hundred sixty-six thousand, six hundred seventy-one".