660194491541 has 8 divisors (see below), whose sum is σ = 714551443200. Its totient is φ = 606347934192.

The previous prime is 660194491501. The next prime is 660194491571. The reversal of 660194491541 is 145194491066.

It is a happy number.

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

It is not a de Polignac number, because 660194491541 - 2²² = 660190297237 is a prime.

It is a super-2 number, since 2×660194491541² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660194491541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660194491501) 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, 127595885 + ... + 127601058.

It is an arithmetic number, because the mean of its divisors is an integer number (89318930400).

Almost surely, 2^660194491541 is an apocalyptic number.

It is an amenable number.

660194491541 is a deficient number, since it is larger than the sum of its proper divisors (54356951659).

660194491541 is a wasteful number, since it uses less digits than its factorization.

660194491541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255197155.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 660194491541 in words is "six hundred sixty billion, one hundred ninety-four million, four hundred ninety-one thousand, five hundred forty-one".