378412301866 has 4 divisors (see below), whose sum is σ = 567618452802. Its totient is φ = 189206150932.

The previous prime is 378412301851. The next prime is 378412301893. The reversal of 378412301866 is 668103214873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 668103214873 = 97 ⋅6887662009.

It can be written as a sum of positive squares in only one way, i.e., 357758300641 + 20654001225 = 598129^2 + 143715^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94603075465 + ... + 94603075468.

Almost surely, 2^378412301866 is an apocalyptic number.

378412301866 is a deficient number, since it is larger than the sum of its proper divisors (189206150936).

378412301866 is a wasteful number, since it uses less digits than its factorization.

378412301866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189206150935.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 378412301866 in words is "three hundred seventy-eight billion, four hundred twelve million, three hundred one thousand, eight hundred sixty-six".