61660126653 has 4 divisors (see below), whose sum is σ = 82213502208. Its totient is φ = 41106751100.

The previous prime is 61660126631. The next prime is 61660126667. The reversal of 61660126653 is 35662106616.

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.

It is a cyclic number.

It is not a de Polignac number, because 61660126653 - 2⁹ = 61660126141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61660122653) 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, 10276687773 + ... + 10276687778.

It is an arithmetic number, because the mean of its divisors is an integer number (20553375552).

Almost surely, 2^61660126653 is an apocalyptic number.

It is an amenable number.

61660126653 is a deficient number, since it is larger than the sum of its proper divisors (20553375555).

61660126653 is a wasteful number, since it uses less digits than its factorization.

61660126653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20553375554.

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 61660126653 in words is "sixty-one billion, six hundred sixty million, one hundred twenty-six thousand, six hundred fifty-three".