61661127007 has 8 divisors (see below), whose sum is σ = 63168768432. Its totient is φ = 60153662400.

The previous prime is 61661127001. The next prime is 61661127019. The reversal of 61661127007 is 70072116616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61661127007 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 (61661127001) 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 7 ways as a sum of consecutive naturals, for example, 910773 + ... + 976129.

It is an arithmetic number, because the mean of its divisors is an integer number (7896096054).

Almost surely, 2^61661127007 is an apocalyptic number.

61661127007 is a deficient number, since it is larger than the sum of its proper divisors (1507641425).

61661127007 is a wasteful number, since it uses less digits than its factorization.

61661127007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88409.

The product of its (nonzero) digits is 21168, while the sum is 37.

The spelling of 61661127007 in words is "sixty-one billion, six hundred sixty-one million, one hundred twenty-seven thousand, seven".