78680581 has 8 divisors (see below), whose sum is σ = 90034560. Its totient is φ = 67355088.

The previous prime is 78680561. The next prime is 78680593. The reversal of 78680581 is 18508687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78680581 - 2⁵ = 78680549 is a prime.

It is a super-2 number, since 2×78680581² = 12381267652995122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78680521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 826 + ... + 12571.

It is an arithmetic number, because the mean of its divisors is an integer number (11254320).

Almost surely, 2^78680581 is an apocalyptic number.

It is an amenable number.

78680581 is a deficient number, since it is larger than the sum of its proper divisors (11353979).

78680581 is a wasteful number, since it uses less digits than its factorization.

78680581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14243.

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 78680581 is about 8870.2074947546. The cubic root of 78680581 is about 428.5049594429.

The spelling of 78680581 in words is "seventy-eight million, six hundred eighty thousand, five hundred eighty-one".