66875295926378 has 4 divisors (see below), whose sum is σ = 100312943889570. Its totient is φ = 33437647963188.

The previous prime is 66875295926377. The next prime is 66875295926441. The reversal of 66875295926378 is 87362959257866.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 56272607271049 + 10602688655329 = 7501507^2 + 3256177^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66875295926296 and 66875295926305.

It is not an unprimeable number, because it can be changed into a prime (66875295926377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16718823981593 + ... + 16718823981596.

Almost surely, 2^{66875295926378} is an apocalyptic number.

66875295926378 is a deficient number, since it is larger than the sum of its proper divisors (33437647963192).

66875295926378 is a wasteful number, since it uses less digits than its factorization.

66875295926378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33437647963191.

The product of its digits is 16460236800, while the sum is 83.

The spelling of 66875295926378 in words is "sixty-six trillion, eight hundred seventy-five billion, two hundred ninety-five million, nine hundred twenty-six thousand, three hundred seventy-eight".