4006640423077 has 2 divisors, whose sum is σ = 4006640423078. Its totient is φ = 4006640423076.

The previous prime is 4006640423057. The next prime is 4006640423083. The reversal of 4006640423077 is 7703240466004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2241850392961 + 1764790030116 = 1497281^2 + 1328454^2 .

It is a cyclic number.

It is not a de Polignac number, because 4006640423077 - 2¹¹ = 4006640421029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4006640423017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2003320211538 + 2003320211539.

It is an arithmetic number, because the mean of its divisors is an integer number (2003320211539).

Almost surely, 2^{4006640423077} is an apocalyptic number.

It is an amenable number.

4006640423077 is a deficient number, since it is larger than the sum of its proper divisors (1).

4006640423077 is an equidigital number, since it uses as much as digits as its factorization.

4006640423077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 43.

The spelling of 4006640423077 in words is "four trillion, six billion, six hundred forty million, four hundred twenty-three thousand, seventy-seven".