61218800668 has 12 divisors (see below), whose sum is σ = 108134143992. Its totient is φ = 30323330960.

The previous prime is 61218800627. The next prime is 61218800689. The reversal of 61218800668 is 86600881216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71516863 + ... + 71517718.

It is an arithmetic number, because the mean of its divisors is an integer number (9011178666).

Almost surely, 2^61218800668 is an apocalyptic number.

It is an amenable number.

61218800668 is a deficient number, since it is larger than the sum of its proper divisors (46915343324).

61218800668 is a wasteful number, since it uses less digits than its factorization.

61218800668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143034692 (or 143034690 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 46.

The spelling of 61218800668 in words is "sixty-one billion, two hundred eighteen million, eight hundred thousand, six hundred sixty-eight".