66468705 has 16 divisors (see below), whose sum is σ = 106557504. Its totient is φ = 35380800.

The previous prime is 66468697. The next prime is 66468713. The reversal of 66468705 is 50786466.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66468697) and next prime (66468713).

It is not a de Polignac number, because 66468705 - 2³ = 66468697 is a prime.

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, 4155 + ... + 12255.

It is an arithmetic number, because the mean of its divisors is an integer number (6659844).

Almost surely, 2^66468705 is an apocalyptic number.

It is an amenable number.

66468705 is a deficient number, since it is larger than the sum of its proper divisors (40088799).

66468705 is a wasteful number, since it uses less digits than its factorization.

66468705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8656.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 66468705 is about 8152.8341697841. The cubic root of 66468705 is about 405.0783875097.

It can be divided in two parts, 6646 and 8705, that added together give a palindrome (15351).

The spelling of 66468705 in words is "sixty-six million, four hundred sixty-eight thousand, seven hundred five".