101666051500501 has 2 divisors, whose sum is σ = 101666051500502. Its totient is φ = 101666051500500.

The previous prime is 101666051500487. The next prime is 101666051500547. The reversal of 101666051500501 is 105005150666101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97175254778001 + 4490796722500 = 9857751^2 + 2119150^2 .

It is a cyclic number.

It is not a de Polignac number, because 101666051500501 - 2¹⁵ = 101666051467733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101666051500571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50833025750250 + 50833025750251.

It is an arithmetic number, because the mean of its divisors is an integer number (50833025750251).

Almost surely, 2^{101666051500501} is an apocalyptic number.

It is an amenable number.

101666051500501 is a deficient number, since it is larger than the sum of its proper divisors (1).

101666051500501 is an equidigital number, since it uses as much as digits as its factorization.

101666051500501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 101666051500501 in words is "one hundred one trillion, six hundred sixty-six billion, fifty-one million, five hundred thousand, five hundred one".