66800945419 has 8 divisors (see below), whose sum is σ = 71954777552. Its totient is φ = 61649298720.

The previous prime is 66800945371. The next prime is 66800945429. The reversal of 66800945419 is 91454900866.

It is a happy number.

66800945419 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66800945419 is a prime.

It is a super-2 number, since 2×66800945419² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66800945429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482592 + ... + 605389.

It is an arithmetic number, because the mean of its divisors is an integer number (8994347194).

Almost surely, 2^66800945419 is an apocalyptic number.

66800945419 is a deficient number, since it is larger than the sum of its proper divisors (5153832133).

66800945419 is a wasteful number, since it uses less digits than its factorization.

66800945419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092717.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 66800945419 in words is "sixty-six billion, eight hundred million, nine hundred forty-five thousand, four hundred nineteen".