100661510106 has 64 divisors (see below), whose sum is σ = 225258848640. Its totient is φ = 33319676160.

The previous prime is 100661510101. The next prime is 100661510129. The reversal of 100661510106 is 601015166001.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 100661510106.

It is not an unprimeable number, because it can be changed into a prime (100661510101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4466386 + ... + 4488866.

It is an arithmetic number, because the mean of its divisors is an integer number (3519669510).

Almost surely, 2^100661510106 is an apocalyptic number.

100661510106 is an abundant number, since it is smaller than the sum of its proper divisors (124597338534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100661510106 is a wasteful number, since it uses less digits than its factorization.

100661510106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23068 (or 23062 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

Adding to 100661510106 its reverse (601015166001), we get a palindrome (701676676107).

The spelling of 100661510106 in words is "one hundred billion, six hundred sixty-one million, five hundred ten thousand, one hundred six".