40666667400407 has 2 divisors, whose sum is σ = 40666667400408. Its totient is φ = 40666667400406.

The previous prime is 40666667400379. The next prime is 40666667400449. The reversal of 40666667400407 is 70400476666604.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40666667400407 - 2³⁰ = 40665593658583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40666660400407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20333333700203 + 20333333700204.

It is an arithmetic number, because the mean of its divisors is an integer number (20333333700204).

Almost surely, 2^{40666667400407} is an apocalyptic number.

40666667400407 is a deficient number, since it is larger than the sum of its proper divisors (1).

40666667400407 is an equidigital number, since it uses as much as digits as its factorization.

40666667400407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24385536, while the sum is 56.

The spelling of 40666667400407 in words is "forty trillion, six hundred sixty-six billion, six hundred sixty-seven million, four hundred thousand, four hundred seven".