66307260426 has 32 divisors (see below), whose sum is σ = 145506656448. Its totient is φ = 19976960640.

The previous prime is 66307260421. The next prime is 66307260431. The reversal of 66307260426 is 62406270366.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66307260421) and next prime (66307260431).

It is not an unprimeable number, because it can be changed into a prime (66307260421) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2892211 + ... + 2915046.

It is an arithmetic number, because the mean of its divisors is an integer number (4547083014).

Almost surely, 2^66307260426 is an apocalyptic number.

66307260426 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66307260426 is an abundant number, since it is smaller than the sum of its proper divisors (79199396022).

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

66307260426 is a wasteful number, since it uses less digits than its factorization.

66307260426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5807446.

The product of its (nonzero) digits is 435456, while the sum is 42.

The spelling of 66307260426 in words is "sixty-six billion, three hundred seven million, two hundred sixty thousand, four hundred twenty-six".