101666465 has 4 divisors (see below), whose sum is σ = 121999764. Its totient is φ = 81333168.

The previous prime is 101666441. The next prime is 101666483. The reversal of 101666465 is 564666101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18181696 + 83484769 = 4264^2 + 9137^2 .

It is a cyclic number.

It is not a de Polignac number, because 101666465 - 2⁶ = 101666401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10166642 + ... + 10166651.

It is an arithmetic number, because the mean of its divisors is an integer number (30499941).

Almost surely, 2^101666465 is an apocalyptic number.

It is an amenable number.

101666465 is a deficient number, since it is larger than the sum of its proper divisors (20333299).

101666465 is an equidigital number, since it uses as much as digits as its factorization.

101666465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20333298.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 101666465 is about 10082.9789744896. The cubic root of 101666465 is about 466.7230405253.

The spelling of 101666465 in words is "one hundred one million, six hundred sixty-six thousand, four hundred sixty-five".