100661560657 has 8 divisors (see below), whose sum is σ = 115056407232. Its totient is φ = 86270370000.

The previous prime is 100661560567. The next prime is 100661560667. The reversal of 100661560657 is 756065166001.

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

It is a cyclic number.

It is not a de Polignac number, because 100661560657 - 2¹⁹ = 100661036369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100661560667) 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, 854719 + ... + 965332.

It is an arithmetic number, because the mean of its divisors is an integer number (14382050904).

Almost surely, 2^100661560657 is an apocalyptic number.

It is an amenable number.

100661560657 is a deficient number, since it is larger than the sum of its proper divisors (14394846575).

100661560657 is an equidigital number, since it uses as much as digits as its factorization.

100661560657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827959.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 100661560657 in words is "one hundred billion, six hundred sixty-one million, five hundred sixty thousand, six hundred fifty-seven".