61666241351 has 16 divisors (see below), whose sum is σ = 72459878400. Its totient is φ = 51738733920.

The previous prime is 61666241341. The next prime is 61666241353. The reversal of 61666241351 is 15314266616.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61666241351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61666241299 and 61666241308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61666241353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843350 + ... + 913548.

It is an arithmetic number, because the mean of its divisors is an integer number (4528742400).

Almost surely, 2^61666241351 is an apocalyptic number.

61666241351 is a deficient number, since it is larger than the sum of its proper divisors (10793637049).

61666241351 is a wasteful number, since it uses less digits than its factorization.

61666241351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76366.

The product of its digits is 155520, while the sum is 41.

The spelling of 61666241351 in words is "sixty-one billion, six hundred sixty-six million, two hundred forty-one thousand, three hundred fifty-one".