661362100186 has 16 divisors (see below), whose sum is σ = 994806836640. Its totient is φ = 329760078480.

The previous prime is 661362100109. The next prime is 661362100187. The reversal of 661362100186 is 681001263166.

It is not an unprimeable number, because it can be changed into a prime (661362100187) 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, 5405440 + ... + 5526436.

It is an arithmetic number, because the mean of its divisors is an integer number (62175427290).

Almost surely, 2^661362100186 is an apocalyptic number.

661362100186 is a deficient number, since it is larger than the sum of its proper divisors (333444736454).

661362100186 is a wasteful number, since it uses less digits than its factorization.

661362100186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128589.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 661362100186 in words is "six hundred sixty-one billion, three hundred sixty-two million, one hundred thousand, one hundred eighty-six".