101666545 has 8 divisors (see below), whose sum is σ = 129176424. Its totient is φ = 76548864.

The previous prime is 101666527. The next prime is 101666557. The reversal of 101666545 is 545666101.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19963024 + 81703521 = 4468^2 + 9039^2 .

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 101666545 - 2¹³ = 101658353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101666545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 597954 + ... + 598123.

It is an arithmetic number, because the mean of its divisors is an integer number (16147053).

Almost surely, 2^101666545 is an apocalyptic number.

It is an amenable number.

101666545 is a deficient number, since it is larger than the sum of its proper divisors (27509879).

101666545 is a wasteful number, since it uses less digits than its factorization.

101666545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196099.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 101666545 is about 10082.9829415704. The cubic root of 101666545 is about 466.7231629447.

The spelling of 101666545 in words is "one hundred one million, six hundred sixty-six thousand, five hundred forty-five".