79680061 has 2 divisors, whose sum is σ = 79680062. Its totient is φ = 79680060.

The previous prime is 79680059. The next prime is 79680101. The reversal of 79680061 is 16008697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70644025 + 9036036 = 8405^2 + 3006^2 .

It is a cyclic number.

It is not a de Polignac number, because 79680061 - 2¹ = 79680059 is a prime.

Together with 79680059, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 79680061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79680961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39840030 + 39840031.

It is an arithmetic number, because the mean of its divisors is an integer number (39840031).

Almost surely, 2^79680061 is an apocalyptic number.

It is an amenable number.

79680061 is a deficient number, since it is larger than the sum of its proper divisors (1).

79680061 is an equidigital number, since it uses as much as digits as its factorization.

79680061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 79680061 is about 8926.3688586121. The cubic root of 79680061 is about 430.3117641711.

The spelling of 79680061 in words is "seventy-nine million, six hundred eighty thousand, sixty-one".