679918536 has 320 divisors, whose sum is σ = 2283240960. Its totient is φ = 186624000.

The previous prime is 679918531. The next prime is 679918541. The reversal of 679918536 is 635819976.

679918536 is a `hidden beast` number, since 6 + 7 + 99 + 18 + 536 = 666.

It is an interprime number because it is at equal distance from previous prime (679918531) and next prime (679918541).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679918531) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3756366 + ... + 3756546.

It is an arithmetic number, because the mean of its divisors is an integer number (7135128).

Almost surely, 2^679918536 is an apocalyptic number.

679918536 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 679918536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1141620480).

679918536 is an abundant number, since it is smaller than the sum of its proper divisors (1603322424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679918536 is a wasteful number, since it uses less digits than its factorization.

679918536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 245 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 679918536 is about 26075.2475731296. The cubic root of 679918536 is about 879.3308170163.

The spelling of 679918536 in words is "six hundred seventy-nine million, nine hundred eighteen thousand, five hundred thirty-six".