66454802419 has 16 divisors (see below), whose sum is σ = 69126462720. Its totient is φ = 63809284000.

The previous prime is 66454802389. The next prime is 66454802437. The reversal of 66454802419 is 91420845466.

It is a cyclic number.

It is not a de Polignac number, because 66454802419 - 2⁵ = 66454802387 is a prime.

It is a super-2 number, since 2×66454802419² (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 (66454809419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4964874 + ... + 4978240.

It is an arithmetic number, because the mean of its divisors is an integer number (4320403920).

Almost surely, 2^66454802419 is an apocalyptic number.

66454802419 is a deficient number, since it is larger than the sum of its proper divisors (2671660301).

66454802419 is a wasteful number, since it uses less digits than its factorization.

66454802419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14330.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 66454802419 in words is "sixty-six billion, four hundred fifty-four million, eight hundred two thousand, four hundred nineteen".