40666879 has 4 divisors (see below), whose sum is σ = 44363880. Its totient is φ = 36969880.

The previous prime is 40666877. The next prime is 40666889. The reversal of 40666879 is 97866604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40666879 - 2¹ = 40666877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40666877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1848484 + ... + 1848505.

It is an arithmetic number, because the mean of its divisors is an integer number (11090970).

Almost surely, 2^40666879 is an apocalyptic number.

40666879 is a deficient number, since it is larger than the sum of its proper divisors (3697001).

40666879 is a wasteful number, since it uses less digits than its factorization.

40666879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697000.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 40666879 is about 6377.0588048096. The cubic root of 40666879 is about 343.8853023734.

The spelling of 40666879 in words is "forty million, six hundred sixty-six thousand, eight hundred seventy-nine".