42661686530 has 32 divisors (see below), whose sum is σ = 77956706880. Its totient is φ = 16805764800.

The previous prime is 42661686527. The next prime is 42661686533. The reversal of 42661686530 is 3568616624.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42661686527) and next prime (42661686533).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42661686533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5289641 + ... + 5297699.

It is an arithmetic number, because the mean of its divisors is an integer number (2436147090).

Almost surely, 2^42661686530 is an apocalyptic number.

42661686530 is a deficient number, since it is larger than the sum of its proper divisors (35295020350).

42661686530 is a wasteful number, since it uses less digits than its factorization.

42661686530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16034.

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 42661686530 in words is "forty-two billion, six hundred sixty-one million, six hundred eighty-six thousand, five hundred thirty".