66334643264 has 28 divisors (see below), whose sum is σ = 132223117824. Its totient is φ = 33018582144.

The previous prime is 66334643261. The next prime is 66334643267. The reversal of 66334643264 is 46234643366.

It is an interprime number because it is at equal distance from previous prime (66334643261) and next prime (66334643267).

It is a super-3 number, since 3×66334643264³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66334643261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2309672 + ... + 2338215.

It is an arithmetic number, because the mean of its divisors is an integer number (4722254208).

Almost surely, 2^66334643264 is an apocalyptic number.

66334643264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66334643264 is a deficient number, since it is larger than the sum of its proper divisors (65888474560).

66334643264 is a wasteful number, since it uses less digits than its factorization.

66334643264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4648122 (or 4648112 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 47.

The spelling of 66334643264 in words is "sixty-six billion, three hundred thirty-four million, six hundred forty-three thousand, two hundred sixty-four".