61666186162 has 16 divisors (see below), whose sum is σ = 105716774592. Its totient is φ = 26427537360.

The previous prime is 61666186133. The next prime is 61666186163. The reversal of 61666186162 is 26168166616.

It is not an unprimeable number, because it can be changed into a prime (61666186163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657337 + ... + 745267.

It is an arithmetic number, because the mean of its divisors is an integer number (6607298412).

Almost surely, 2^61666186162 is an apocalyptic number.

61666186162 is a deficient number, since it is larger than the sum of its proper divisors (44050588430).

61666186162 is a wasteful number, since it uses less digits than its factorization.

61666186162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138033.

The product of its digits is 746496, while the sum is 49.

The spelling of 61666186162 in words is "sixty-one billion, six hundred sixty-six million, one hundred eighty-six thousand, one hundred sixty-two".