103661531566 has 8 divisors (see below), whose sum is σ = 155498355144. Its totient is φ = 51828746520.

The previous prime is 103661531537. The next prime is 103661531569. The reversal of 103661531566 is 665135166301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103661531569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 944625 + ... + 1048636.

It is an arithmetic number, because the mean of its divisors is an integer number (19437294393).

Almost surely, 2^103661531566 is an apocalyptic number.

103661531566 is a deficient number, since it is larger than the sum of its proper divisors (51836823578).

103661531566 is a wasteful number, since it uses less digits than its factorization.

103661531566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019266.

The product of its (nonzero) digits is 291600, while the sum is 43.

Adding to 103661531566 its reverse (665135166301), we get a palindrome (768796697867).

The spelling of 103661531566 in words is "one hundred three billion, six hundred sixty-one million, five hundred thirty-one thousand, five hundred sixty-six".