678146693701 has 4 divisors (see below), whose sum is σ = 694686857004. Its totient is φ = 661606530400.

The previous prime is 678146693699. The next prime is 678146693717. The reversal of 678146693701 is 107396641876.

678146693701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36585743076 + 641560950625 = 191274^2 + 800975^2 .

It is a cyclic number.

It is not a de Polignac number, because 678146693701 - 2¹ = 678146693699 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678146693401) 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, 8270081590 + ... + 8270081671.

It is an arithmetic number, because the mean of its divisors is an integer number (173671714251).

Almost surely, 2^678146693701 is an apocalyptic number.

It is an amenable number.

678146693701 is a deficient number, since it is larger than the sum of its proper divisors (16540163303).

678146693701 is a wasteful number, since it uses less digits than its factorization.

678146693701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16540163302.

The product of its (nonzero) digits is 9144576, while the sum is 58.

The spelling of 678146693701 in words is "six hundred seventy-eight billion, one hundred forty-six million, six hundred ninety-three thousand, seven hundred one".