773660853966 has 1024 divisors, whose sum is σ = 2422946856960. Its totient is φ = 157925376000.

The previous prime is 773660853943. The next prime is 773660853989. The reversal of 773660853966 is 669358066377.

773660853966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (773660853943) and next prime (773660853989).

It is a super-2 number, since 2×773660853966² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 773660853897 and 773660853906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 5647159450 + ... + 5647159586.

It is an arithmetic number, because the mean of its divisors is an integer number (2366159040).

Almost surely, 2^773660853966 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 773660853966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1211473428480).

773660853966 is an abundant number, since it is smaller than the sum of its proper divisors (1649286002994).

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

773660853966 is a wasteful number, since it uses less digits than its factorization.

773660853966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321.

The product of its (nonzero) digits is 205752960, while the sum is 66.

The spelling of 773660853966 in words is "seven hundred seventy-three billion, six hundred sixty million, eight hundred fifty-three thousand, nine hundred sixty-six".