101866943287 has 2 divisors, whose sum is σ = 101866943288. Its totient is φ = 101866943286.

The previous prime is 101866943263. The next prime is 101866943323. The reversal of 101866943287 is 782349668101.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101866943287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101866943207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50933471643 + 50933471644.

It is an arithmetic number, because the mean of its divisors is an integer number (50933471644).

Almost surely, 2^101866943287 is an apocalyptic number.

101866943287 is a deficient number, since it is larger than the sum of its proper divisors (1).

101866943287 is an equidigital number, since it uses as much as digits as its factorization.

101866943287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 101866943287 in words is "one hundred one billion, eight hundred sixty-six million, nine hundred forty-three thousand, two hundred eighty-seven".