678365699 has 6 divisors (see below), whose sum is σ = 740129556. Its totient is φ = 616617560.

The previous prime is 678365693. The next prime is 678365707. The reversal of 678365699 is 996563876.

It is not a de Polignac number, because 678365699 - 2¹⁶ = 678300163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678365693) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82457 + ... + 90309.

It is an arithmetic number, because the mean of its divisors is an integer number (123354926).

Almost surely, 2^678365699 is an apocalyptic number.

678365699 is a deficient number, since it is larger than the sum of its proper divisors (61763857).

678365699 is an frugal number, since it uses more digits than its factorization.

678365699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15717 (or 7864 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 59.

The square root of 678365699 is about 26045.4544786610. The cubic root of 678365699 is about 878.6608846739.

The spelling of 678365699 in words is "six hundred seventy-eight million, three hundred sixty-five thousand, six hundred ninety-nine".