3501166051661 has 4 divisors (see below), whose sum is σ = 3506714651424. Its totient is φ = 3495617451900.

The previous prime is 3501166051609. The next prime is 3501166051741. The reversal of 3501166051661 is 1661506611053.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3501166051661 - 2³⁰ = 3500092309837 is a prime.

It is a super-2 number, since 2×3501166051661² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3501166051601) 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, 2774298935 + ... + 2774300196.

It is an arithmetic number, because the mean of its divisors is an integer number (876678662856).

Almost surely, 2^{3501166051661} is an apocalyptic number.

It is an amenable number.

3501166051661 is a deficient number, since it is larger than the sum of its proper divisors (5548599763).

3501166051661 is an equidigital number, since it uses as much as digits as its factorization.

3501166051661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5548599762.

The product of its (nonzero) digits is 97200, while the sum is 41.

The spelling of 3501166051661 in words is "three trillion, five hundred one billion, one hundred sixty-six million, fifty-one thousand, six hundred sixty-one".