61066397751 has 8 divisors (see below), whose sum is σ = 81921384960. Its totient is φ = 40461171192.

The previous prime is 61066397747. The next prime is 61066397761. The reversal of 61066397751 is 15779366016.

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

It is not a de Polignac number, because 61066397751 - 2² = 61066397747 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 61066397694 and 61066397703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61066397761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62439591 + ... + 62440568.

It is an arithmetic number, because the mean of its divisors is an integer number (10240173120).

Almost surely, 2^61066397751 is an apocalyptic number.

61066397751 is a deficient number, since it is larger than the sum of its proper divisors (20854987209).

61066397751 is a wasteful number, since it uses less digits than its factorization.

61066397751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124880325.

The product of its (nonzero) digits is 1428840, while the sum is 51.

The spelling of 61066397751 in words is "sixty-one billion, sixty-six million, three hundred ninety-seven thousand, seven hundred fifty-one".