67979865320 has 16 divisors (see below), whose sum is σ = 152954697060. Its totient is φ = 27191946112.

The previous prime is 67979865307. The next prime is 67979865329. The reversal of 67979865320 is 2356897976.

It can be written as a sum of positive squares in 2 ways, for example, as 66521694724 + 1458170596 = 257918^2 + 38186^2 .

It is not an unprimeable number, because it can be changed into a prime (67979865329) 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, 849748277 + ... + 849748356.

Almost surely, 2^67979865320 is an apocalyptic number.

It is an amenable number.

67979865320 is an abundant number, since it is smaller than the sum of its proper divisors (84974831740).

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

67979865320 is a wasteful number, since it uses less digits than its factorization.

67979865320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699496644 (or 1699496640 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 62.

The spelling of 67979865320 in words is "sixty-seven billion, nine hundred seventy-nine million, eight hundred sixty-five thousand, three hundred twenty".