3501754666661 has 2 divisors, whose sum is σ = 3501754666662. Its totient is φ = 3501754666660.

The previous prime is 3501754666643. The next prime is 3501754666733. The reversal of 3501754666661 is 1666664571053.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3501741234436 + 13432225 = 1871294^2 + 3665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3501754666661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3501754666597 and 3501754666606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3501754666621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1750877333330 + 1750877333331.

It is an arithmetic number, because the mean of its divisors is an integer number (1750877333331).

Almost surely, 2^{3501754666661} is an apocalyptic number.

It is an amenable number.

3501754666661 is a deficient number, since it is larger than the sum of its proper divisors (1).

3501754666661 is an equidigital number, since it uses as much as digits as its factorization.

3501754666661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16329600, while the sum is 56.

The spelling of 3501754666661 in words is "three trillion, five hundred one billion, seven hundred fifty-four million, six hundred sixty-six thousand, six hundred sixty-one".