77166716216450 has 48 divisors (see below), whose sum is σ = 164038203186624. Its totient is φ = 26456544984000.

The previous prime is 77166716216441. The next prime is 77166716216531. The reversal of 77166716216450 is 5461261766177.

It is a super-3 number, since 3×77166716216450³ (a number of 43 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77166716216450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12648725 + ... + 17729175.

It is an arithmetic number, because the mean of its divisors is an integer number (3417462566388).

Almost surely, 2^{77166716216450} is an apocalyptic number.

77166716216450 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

77166716216450 is an abundant number, since it is smaller than the sum of its proper divisors (86871486970174).

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

77166716216450 is a wasteful number, since it uses less digits than its factorization.

77166716216450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123867 (or 5123862 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 59.

The spelling of 77166716216450 in words is "seventy-seven trillion, one hundred sixty-six billion, seven hundred sixteen million, two hundred sixteen thousand, four hundred fifty".