61660247473 has 16 divisors (see below), whose sum is σ = 68757258240. Its totient is φ = 54813922000.

The previous prime is 61660247459. The next prime is 61660247479. The reversal of 61660247473 is 37474206616.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61660247473 is a prime.

It is a super-3 number, since 3×61660247473³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (61660247479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543258 + ... + 646876.

It is an arithmetic number, because the mean of its divisors is an integer number (4297328640).

Almost surely, 2^61660247473 is an apocalyptic number.

It is an amenable number.

61660247473 is a deficient number, since it is larger than the sum of its proper divisors (7097010767).

61660247473 is a wasteful number, since it uses less digits than its factorization.

61660247473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104828.

The product of its (nonzero) digits is 1016064, while the sum is 46.

The spelling of 61660247473 in words is "sixty-one billion, six hundred sixty million, two hundred forty-seven thousand, four hundred seventy-three".