5061501666661 has 8 divisors (see below), whose sum is σ = 5523380611200. Its totient is φ = 4599913127040.

The previous prime is 5061501666631. The next prime is 5061501666667. The reversal of 5061501666661 is 1666661051605.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5061501666661 - 2¹³ = 5061501658469 is a prime.

It is a super-2 number, since 2×5061501666661² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5061501666667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72564781 + ... + 72634498.

It is an arithmetic number, because the mean of its divisors is an integer number (690422576400).

Almost surely, 2^{5061501666661} is an apocalyptic number.

It is an amenable number.

5061501666661 is a deficient number, since it is larger than the sum of its proper divisors (461878944539).

5061501666661 is a wasteful number, since it uses less digits than its factorization.

5061501666661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145202459.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 5061501666661 in words is "five trillion, sixty-one billion, five hundred one million, six hundred sixty-six thousand, six hundred sixty-one".