40669999 has 2 divisors, whose sum is σ = 40670000. Its totient is φ = 40669998.

The previous prime is 40669987. The next prime is 40670009. The reversal of 40669999 is 99996604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40669999 - 2⁹ = 40669487 is a prime.

40669999 is a modest number, since divided by 9999 gives 4066 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40669969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20334999 + 20335000.

It is an arithmetic number, because the mean of its divisors is an integer number (20335000).

Almost surely, 2^40669999 is an apocalyptic number.

40669999 is a deficient number, since it is larger than the sum of its proper divisors (1).

40669999 is an equidigital number, since it uses as much as digits as its factorization.

40669999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 52.

The square root of 40669999 is about 6377.3034269980. The cubic root of 40669999 is about 343.8940965464.

The spelling of 40669999 in words is "forty million, six hundred sixty-nine thousand, nine hundred ninety-nine".