101608506661 has 16 divisors (see below), whose sum is σ = 109379793600. Its totient is φ = 94199067648.

The previous prime is 101608506599. The next prime is 101608506667. The reversal of 101608506661 is 166605806101.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-101608506661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101608506667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 616956 + ... + 764101.

It is an arithmetic number, because the mean of its divisors is an integer number (6836237100).

Almost surely, 2^101608506661 is an apocalyptic number.

It is an amenable number.

101608506661 is a deficient number, since it is larger than the sum of its proper divisors (7771286939).

101608506661 is a wasteful number, since it uses less digits than its factorization.

101608506661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381188.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 101608506661 in words is "one hundred one billion, six hundred eight million, five hundred six thousand, six hundred sixty-one".