60661122661639 has 2 divisors, whose sum is σ = 60661122661640. Its totient is φ = 60661122661638.

The previous prime is 60661122661631. The next prime is 60661122661669. The reversal of 60661122661639 is 93616622116606.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 60661122661639 - 2³ = 60661122661631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 60661122661639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (60661122661631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30330561330819 + 30330561330820.

It is an arithmetic number, because the mean of its divisors is an integer number (30330561330820).

Almost surely, 2^{60661122661639} is an apocalyptic number.

60661122661639 is a deficient number, since it is larger than the sum of its proper divisors (1).

60661122661639 is an equidigital number, since it uses as much as digits as its factorization.

60661122661639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 55.

The spelling of 60661122661639 in words is "sixty trillion, six hundred sixty-one billion, one hundred twenty-two million, six hundred sixty-one thousand, six hundred thirty-nine".