378816066407 has 4 divisors (see below), whose sum is σ = 379066773456. Its totient is φ = 378565359360.

The previous prime is 378816066367. The next prime is 378816066413. The reversal of 378816066407 is 704660618873.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378816066407 is a prime.

It is a super-2 number, since 2×378816066407² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378816066427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125351258 + ... + 125354279.

It is an arithmetic number, because the mean of its divisors is an integer number (94766693364).

Almost surely, 2^378816066407 is an apocalyptic number.

378816066407 is a deficient number, since it is larger than the sum of its proper divisors (250707049).

378816066407 is a wasteful number, since it uses less digits than its factorization.

378816066407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250707048.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 378816066407 in words is "three hundred seventy-eight billion, eight hundred sixteen million, sixty-six thousand, four hundred seven".