40000660067 has 2 divisors, whose sum is σ = 40000660068. Its totient is φ = 40000660066.

The previous prime is 40000660061. The next prime is 40000660079. The reversal of 40000660067 is 76006600004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40000660067 - 2¹⁸ = 40000397923 is a prime.

It is not a weakly prime, because it can be changed into another prime (40000660061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20000330033 + 20000330034.

It is an arithmetic number, because the mean of its divisors is an integer number (20000330034).

Almost surely, 2^40000660067 is an apocalyptic number.

40000660067 is a deficient number, since it is larger than the sum of its proper divisors (1).

40000660067 is an equidigital number, since it uses as much as digits as its factorization.

40000660067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The spelling of 40000660067 in words is "forty billion, six hundred sixty thousand, sixty-seven".