378166661873 has 48 divisors (see below), whose sum is σ = 522036278400. Its totient is φ = 272007600480.

The previous prime is 378166661849. The next prime is 378166661881.

378166661873 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 378166661873 - 2⁶ = 378166661809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (378166661813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189086 + ... + 889992.

It is an arithmetic number, because the mean of its divisors is an integer number (10875755800).

Almost surely, 2^378166661873 is an apocalyptic number.

It is an amenable number.

378166661873 is a deficient number, since it is larger than the sum of its proper divisors (143869616527).

378166661873 is a wasteful number, since it uses less digits than its factorization.

378166661873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700963 (or 700938 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 62.

The spelling of 378166661873 in words is "three hundred seventy-eight billion, one hundred sixty-six million, six hundred sixty-one thousand, eight hundred seventy-three".