66840804119 has 16 divisors (see below), whose sum is σ = 72430212960. Its totient is φ = 61452610560.

The previous prime is 66840804109. The next prime is 66840804127. The reversal of 66840804119 is 91140804866.

66840804119 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66840804119 - 2¹² = 66840800023 is a prime.

It is a super-2 number, since 2×66840804119² (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 (66840804109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140552 + ... + 391709.

It is an arithmetic number, because the mean of its divisors is an integer number (4526888310).

Almost surely, 2^66840804119 is an apocalyptic number.

66840804119 is a deficient number, since it is larger than the sum of its proper divisors (5589408841).

66840804119 is a wasteful number, since it uses less digits than its factorization.

66840804119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532450.

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 66840804119 in words is "sixty-six billion, eight hundred forty million, eight hundred four thousand, one hundred nineteen".