66378424305 has 16 divisors (see below), whose sum is σ = 106260525504. Its totient is φ = 35383477440.

The previous prime is 66378424303. The next prime is 66378424309. The reversal of 66378424305 is 50342487366.

It is not a de Polignac number, because 66378424305 - 2¹ = 66378424303 is a prime.

It is a super-2 number, since 2×66378424305² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66378424303) 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, 1116874 + ... + 1174803.

It is an arithmetic number, because the mean of its divisors is an integer number (6641282844).

Almost surely, 2^66378424305 is an apocalyptic number.

It is an amenable number.

66378424305 is a deficient number, since it is larger than the sum of its proper divisors (39882101199).

66378424305 is a wasteful number, since it uses less digits than its factorization.

66378424305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293616.

The product of its (nonzero) digits is 2903040, while the sum is 48.

The spelling of 66378424305 in words is "sixty-six billion, three hundred seventy-eight million, four hundred twenty-four thousand, three hundred five".