55661651522066 has 32 divisors (see below), whose sum is σ = 85147919176320. Its totient is φ = 27283493260800.

The previous prime is 55661651522053. The next prime is 55661651522077. The reversal of 55661651522066 is 66022515616655.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191514605 + ... + 191805023.

It is an arithmetic number, because the mean of its divisors is an integer number (2660872474260).

Almost surely, 2^{55661651522066} is an apocalyptic number.

55661651522066 is a deficient number, since it is larger than the sum of its proper divisors (29486267654254).

55661651522066 is a wasteful number, since it uses less digits than its factorization.

55661651522066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298130.

The product of its (nonzero) digits is 19440000, while the sum is 56.

The spelling of 55661651522066 in words is "fifty-five trillion, six hundred sixty-one billion, six hundred fifty-one million, five hundred twenty-two thousand, sixty-six".