66105005 has 16 divisors (see below), whose sum is σ = 80607744. Its totient is φ = 52036800.

The previous prime is 66104963. The next prime is 66105019. The reversal of 66105005 is 50050166.

It is not a de Polignac number, because 66105005 - 2⁸ = 66104749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112322 + ... + 112908.

It is an arithmetic number, because the mean of its divisors is an integer number (5037984).

Almost surely, 2^66105005 is an apocalyptic number.

It is an amenable number.

66105005 is a deficient number, since it is larger than the sum of its proper divisors (14502739).

66105005 is a wasteful number, since it uses less digits than its factorization.

66105005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 66105005 is about 8130.4984472048. The cubic root of 66105005 is about 404.3382068915.

The spelling of 66105005 in words is "sixty-six million, one hundred five thousand, five".