66261416266 has 16 divisors (see below), whose sum is σ = 103719559104. Its totient is φ = 31688397664.

The previous prime is 66261416257. The next prime is 66261416269.

66261416266 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×66261416266² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (66261416269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1079046 + ... + 1138798.

It is an arithmetic number, because the mean of its divisors is an integer number (6482472444).

Almost surely, 2^66261416266 is an apocalyptic number.

66261416266 is a deficient number, since it is larger than the sum of its proper divisors (37458142838).

66261416266 is a wasteful number, since it uses less digits than its factorization.

66261416266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83885.

The product of its digits is 746496, while the sum is 46.

The spelling of 66261416266 in words is "sixty-six billion, two hundred sixty-one million, four hundred sixteen thousand, two hundred sixty-six".