1401666695705 has 4 divisors (see below), whose sum is σ = 1682000034852. Its totient is φ = 1121333356560.

The previous prime is 1401666695687. The next prime is 1401666695747. The reversal of 1401666695705 is 5075966661041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1018119342361 + 383547353344 = 1009019^2 + 619312^2 .

It is not a de Polignac number, because 1401666695705 - 2¹⁸ = 1401666433561 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 140166669566 + ... + 140166669575.

It is an arithmetic number, because the mean of its divisors is an integer number (420500008713).

Almost surely, 2^{1401666695705} is an apocalyptic number.

It is an amenable number.

1401666695705 is a deficient number, since it is larger than the sum of its proper divisors (280333339147).

1401666695705 is an equidigital number, since it uses as much as digits as its factorization.

1401666695705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280333339146.

The product of its (nonzero) digits is 8164800, while the sum is 56.

The spelling of 1401666695705 in words is "one trillion, four hundred one billion, six hundred sixty-six million, six hundred ninety-five thousand, seven hundred five".