61866062496 has 144 divisors (see below), whose sum is σ = 209902855680. Its totient is φ = 17676005760.

The previous prime is 61866062459. The next prime is 61866062497. The reversal of 61866062496 is 69426066816.

61866062496 is a `hidden beast` number, since 6 + 1 + 8 + 6 + 6 + 0 + 624 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (61866062497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 688320 + ... + 772991.

It is an arithmetic number, because the mean of its divisors is an integer number (1457658720).

Almost surely, 2^61866062496 is an apocalyptic number.

It is an amenable number.

61866062496 is an abundant number, since it is smaller than the sum of its proper divisors (148036793184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61866062496 is a wasteful number, since it uses less digits than its factorization.

61866062496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461344 (or 1461323 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 61866062496 in words is "sixty-one billion, eight hundred sixty-six million, sixty-two thousand, four hundred ninety-six".