1400701866661 has 4 divisors (see below), whose sum is σ = 1400992896172. Its totient is φ = 1400410837152.

The previous prime is 1400701866649. The next prime is 1400701866779. The reversal of 1400701866661 is 1666681070041.

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 579197102500 + 821504764161 = 761050^2 + 906369^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400701866661 - 2⁷ = 1400701866533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400701866631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145507536 + ... + 145517161.

It is an arithmetic number, because the mean of its divisors is an integer number (350248224043).

Almost surely, 2^{1400701866661} is an apocalyptic number.

It is an amenable number.

1400701866661 is a deficient number, since it is larger than the sum of its proper divisors (291029511).

1400701866661 is an equidigital number, since it uses as much as digits as its factorization.

1400701866661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291029510.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 1400701866661 in words is "one trillion, four hundred billion, seven hundred one million, eight hundred sixty-six thousand, six hundred sixty-one".