101661161 has 4 divisors (see below), whose sum is σ = 116184192. Its totient is φ = 87138132.

The previous prime is 101661151. The next prime is 101661179. The reversal of 101661161 is 161166101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101661161 - 2⁶ = 101661097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101661101) 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, 7261505 + ... + 7261518.

It is an arithmetic number, because the mean of its divisors is an integer number (29046048).

Almost surely, 2^101661161 is an apocalyptic number.

It is an amenable number.

101661161 is a deficient number, since it is larger than the sum of its proper divisors (14523031).

101661161 is an equidigital number, since it uses as much as digits as its factorization.

101661161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14523030.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 101661161 is about 10082.7159535514. The cubic root of 101661161 is about 466.7149239779.

The spelling of 101661161 in words is "one hundred one million, six hundred sixty-one thousand, one hundred sixty-one".