3966197356787 has 2 divisors, whose sum is σ = 3966197356788. Its totient is φ = 3966197356786.

The previous prime is 3966197356783. The next prime is 3966197356817. The reversal of 3966197356787 is 7876537916693.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3966197356787 - 2² = 3966197356783 is a prime.

It is not a weakly prime, because it can be changed into another prime (3966197356783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1983098678393 + 1983098678394.

It is an arithmetic number, because the mean of its divisors is an integer number (1983098678394).

Almost surely, 2^{3966197356787} is an apocalyptic number.

3966197356787 is a deficient number, since it is larger than the sum of its proper divisors (1).

3966197356787 is an equidigital number, since it uses as much as digits as its factorization.

3966197356787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160406080, while the sum is 77.

The spelling of 3966197356787 in words is "three trillion, nine hundred sixty-six billion, one hundred ninety-seven million, three hundred fifty-six thousand, seven hundred eighty-seven".