66700219933 has 16 divisors (see below), whose sum is σ = 71161130880. Its totient is φ = 62300432896.

The previous prime is 66700219879. The next prime is 66700219973. The reversal of 66700219933 is 33991200766.

It is a cyclic number.

It is not a de Polignac number, because 66700219933 - 2²⁵ = 66666665501 is a prime.

It is a super-2 number, since 2×66700219933² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66700219973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1508841 + ... + 1552417.

It is an arithmetic number, because the mean of its divisors is an integer number (4447570680).

Almost surely, 2^66700219933 is an apocalyptic number.

It is an amenable number.

66700219933 is a deficient number, since it is larger than the sum of its proper divisors (4460910947).

66700219933 is a wasteful number, since it uses less digits than its factorization.

66700219933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44276.

The product of its (nonzero) digits is 367416, while the sum is 46.

The spelling of 66700219933 in words is "sixty-six billion, seven hundred million, two hundred nineteen thousand, nine hundred thirty-three".