60071211661 has 4 divisors (see below), whose sum is σ = 63232854400. Its totient is φ = 56909568924.

The previous prime is 60071211637. The next prime is 60071211719. The reversal of 60071211661 is 16611217006.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16611217006 = 2 ⋅8305608503.

It is a cyclic number.

It is not a de Polignac number, because 60071211661 - 2⁷ = 60071211533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60071241661) 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, 1580821341 + ... + 1580821378.

It is an arithmetic number, because the mean of its divisors is an integer number (15808213600).

Almost surely, 2^60071211661 is an apocalyptic number.

It is an amenable number.

60071211661 is a deficient number, since it is larger than the sum of its proper divisors (3161642739).

60071211661 is a wasteful number, since it uses less digits than its factorization.

60071211661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3161642738.

The product of its (nonzero) digits is 3024, while the sum is 31.

Adding to 60071211661 its reverse (16611217006), we get a palindrome (76682428667).

The spelling of 60071211661 in words is "sixty billion, seventy-one million, two hundred eleven thousand, six hundred sixty-one".