77700077770 has 64 divisors (see below), whose sum is σ = 169508215296. Its totient is φ = 25033605120.

The previous prime is 77700077743. The next prime is 77700077797. The reversal of 77700077770 is 7777000777.

It is an interprime number because it is at equal distance from previous prime (77700077743) and next prime (77700077797).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 711859 + ... + 813721.

It is an arithmetic number, because the mean of its divisors is an integer number (2648565864).

Almost surely, 2^77700077770 is an apocalyptic number.

77700077770 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

77700077770 is an abundant number, since it is smaller than the sum of its proper divisors (91808137526).

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

77700077770 is a wasteful number, since it uses less digits than its factorization.

77700077770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102535.

The product of its (nonzero) digits is 823543, while the sum is 49.

It can be divided in two parts, 7770007 and 7770, that added together give a palindrome (7777777).

The spelling of 77700077770 in words is "seventy-seven billion, seven hundred million, seventy-seven thousand, seven hundred seventy".