77068861 has 4 divisors (see below), whose sum is σ = 78708672. Its totient is φ = 75429052.

The previous prime is 77068843. The next prime is 77068897. The reversal of 77068861 is 16886077.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77068861 - 2⁵ = 77068829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77068661) 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 in 3 ways as a sum of consecutive naturals, for example, 819835 + ... + 819928.

It is an arithmetic number, because the mean of its divisors is an integer number (19677168).

Almost surely, 2^77068861 is an apocalyptic number.

It is an amenable number.

77068861 is a deficient number, since it is larger than the sum of its proper divisors (1639811).

77068861 is a wasteful number, since it uses less digits than its factorization.

77068861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639810.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 77068861 is about 8778.8872301676. The cubic root of 77068861 is about 425.5588698458.

The spelling of 77068861 in words is "seventy-seven million, sixty-eight thousand, eight hundred sixty-one".