77069881 has 4 divisors (see below), whose sum is σ = 88079872. Its totient is φ = 66059892.

The previous prime is 77069879. The next prime is 77069911. The reversal of 77069881 is 18896077.

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 77069881 - 2¹ = 77069879 is a prime.

It is a super-3 number, since 3×77069881³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77069821) 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, 5504985 + ... + 5504998.

It is an arithmetic number, because the mean of its divisors is an integer number (22019968).

Almost surely, 2^77069881 is an apocalyptic number.

It is an amenable number.

77069881 is a deficient number, since it is larger than the sum of its proper divisors (11009991).

77069881 is a wasteful number, since it uses less digits than its factorization.

77069881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11009990.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 77069881 is about 8778.9453238985. The cubic root of 77069881 is about 425.5607472496.

The spelling of 77069881 in words is "seventy-seven million, sixty-nine thousand, eight hundred eighty-one".