101518661 has 4 divisors (see below), whose sum is σ = 101697024. Its totient is φ = 101340300.

The previous prime is 101518621. The next prime is 101518663. The reversal of 101518661 is 166815101.

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 101518661 - 2¹⁸ = 101256517 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 (101518663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88325 + ... + 89466.

It is an arithmetic number, because the mean of its divisors is an integer number (25424256).

Almost surely, 2^101518661 is an apocalyptic number.

It is an amenable number.

101518661 is a deficient number, since it is larger than the sum of its proper divisors (178363).

101518661 is an equidigital number, since it uses as much as digits as its factorization.

101518661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178362.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 101518661 is about 10075.6469271209. The cubic root of 101518661 is about 466.4967548665.

The spelling of 101518661 in words is "one hundred one million, five hundred eighteen thousand, six hundred sixty-one".