66557763663008 has 24 divisors (see below), whose sum is σ = 131903382633120. Its totient is φ = 33058491883200.

The previous prime is 66557763662989. The next prime is 66557763663091. The reversal of 66557763663008 is 80036636775566.

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, 6887180978 + ... + 6887190641.

It is an arithmetic number, because the mean of its divisors is an integer number (5495974276380).

Almost surely, 2^{66557763663008} is an apocalyptic number.

It is an amenable number.

66557763663008 is a deficient number, since it is larger than the sum of its proper divisors (65345618970112).

66557763663008 is a wasteful number, since it uses less digits than its factorization.

66557763663008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13774371780 (or 13774371772 counting only the distinct ones).

The product of its (nonzero) digits is 685843200, while the sum is 68.

The spelling of 66557763663008 in words is "sixty-six trillion, five hundred fifty-seven billion, seven hundred sixty-three million, six hundred sixty-three thousand, eight".