6894600400066 has 4 divisors (see below), whose sum is σ = 10341900600102. Its totient is φ = 3447300200032.

The previous prime is 6894600399971. The next prime is 6894600400067. The reversal of 6894600400066 is 6600040064986.

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., 5338082164041 + 1556518236025 = 2310429^2 + 1247605^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6894600399992 and 6894600400019.

It is not an unprimeable number, because it can be changed into a prime (6894600400067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1723650100015 + ... + 1723650100018.

Almost surely, 2^{6894600400066} is an apocalyptic number.

6894600400066 is a deficient number, since it is larger than the sum of its proper divisors (3447300200036).

6894600400066 is a wasteful number, since it uses less digits than its factorization.

6894600400066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3447300200035.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The spelling of 6894600400066 in words is "six trillion, eight hundred ninety-four billion, six hundred million, four hundred thousand, sixty-six".