77866423104 has 56 divisors (see below), whose sum is σ = 206605388160. Its totient is φ = 25881923584.

The previous prime is 77866423099. The next prime is 77866423109. The reversal of 77866423104 is 40132466877.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77866423099) and next prime (77866423109).

It is a super-2 number, since 2×77866423104² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77866423109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506664 + ... + 642215.

Almost surely, 2^77866423104 is an apocalyptic number.

It is an amenable number.

77866423104 is an abundant number, since it is smaller than the sum of its proper divisors (128738965056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77866423104 is a wasteful number, since it uses less digits than its factorization.

77866423104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149247 (or 1149237 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 77866423104 in words is "seventy-seven billion, eight hundred sixty-six million, four hundred twenty-three thousand, one hundred four".