601161661661 has 8 divisors (see below), whose sum is σ = 662179836864. Its totient is φ = 541204672320.

The previous prime is 601161661651. The next prime is 601161661663. The reversal of 601161661661 is 166166161106.

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

It is a cyclic number.

It is not a de Polignac number, because 601161661661 - 2³⁸ = 326283754717 is a prime.

It is a super-2 number, since 2×601161661661² (a number of 24 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 (601161661663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265295276 + ... + 265297541.

It is an arithmetic number, because the mean of its divisors is an integer number (82772479608).

Almost surely, 2^601161661661 is an apocalyptic number.

It is an amenable number.

601161661661 is a deficient number, since it is larger than the sum of its proper divisors (61018175203).

601161661661 is a wasteful number, since it uses less digits than its factorization.

601161661661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530592931.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 601161661661 in words is "six hundred one billion, one hundred sixty-one million, six hundred sixty-one thousand, six hundred sixty-one".