66434611643466 has 32 divisors (see below), whose sum is σ = 148865763688128. Its totient is φ = 19587600483840.

The previous prime is 66434611643461. The next prime is 66434611643467.

66434611643466 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (66434611643461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13602497895 + ... + 13602502778.

It is an arithmetic number, because the mean of its divisors is an integer number (4652055115254).

Almost surely, 2^{66434611643466} is an apocalyptic number.

66434611643466 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66434611643466 is an abundant number, since it is smaller than the sum of its proper divisors (82431152044662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66434611643466 is a wasteful number, since it uses less digits than its factorization.

66434611643466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27205000726.

The product of its digits is 107495424, while the sum is 60.

The spelling of 66434611643466 in words is "sixty-six trillion, four hundred thirty-four billion, six hundred eleven million, six hundred forty-three thousand, four hundred sixty-six".