77368881 has 4 divisors (see below), whose sum is σ = 103158512. Its totient is φ = 51579252.

The previous prime is 77368877. The next prime is 77368891. The reversal of 77368881 is 18886377.

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 not a de Polignac number, because 77368881 - 2² = 77368877 is a prime.

It is a super-2 number, since 2×77368881² = 11971887494384322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77368881.

It is not an unprimeable number, because it can be changed into a prime (77368871) 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, 12894811 + ... + 12894816.

It is an arithmetic number, because the mean of its divisors is an integer number (25789628).

Almost surely, 2^77368881 is an apocalyptic number.

It is an amenable number.

77368881 is a deficient number, since it is larger than the sum of its proper divisors (25789631).

77368881 is a wasteful number, since it uses less digits than its factorization.

77368881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25789630.

The product of its digits is 451584, while the sum is 48.

The square root of 77368881 is about 8795.9582195461. The cubic root of 77368881 is about 426.1103716748.

The spelling of 77368881 in words is "seventy-seven million, three hundred sixty-eight thousand, eight hundred eighty-one".