40578667 has 2 divisors, whose sum is σ = 40578668. Its totient is φ = 40578666.

The previous prime is 40578653. The next prime is 40578697. The reversal of 40578667 is 76687504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40578667 - 2¹¹ = 40576619 is a prime.

It is not a weakly prime, because it can be changed into another prime (40578697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20289333 + 20289334.

It is an arithmetic number, because the mean of its divisors is an integer number (20289334).

Almost surely, 2^40578667 is an apocalyptic number.

40578667 is a deficient number, since it is larger than the sum of its proper divisors (1).

40578667 is an equidigital number, since it uses as much as digits as its factorization.

40578667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 40578667 is about 6370.1386955073. The cubic root of 40578667 is about 343.6364776873.

The spelling of 40578667 in words is "forty million, five hundred seventy-eight thousand, six hundred sixty-seven".