1778666158080 has 1728 divisors, whose sum is σ = 7713674841600. Its totient is φ = 370262016000.

The previous prime is 1778666158069. The next prime is 1778666158103. The reversal of 1778666158080 is 808516668771.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 1778666157999 and 1778666158017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 11779246005 + ... + 11779246155.

It is an arithmetic number, because the mean of its divisors is an integer number (4463932200).

Almost surely, 2^{1778666158080} is an apocalyptic number.

1778666158080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1778666158080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3856837420800).

1778666158080 is an abundant number, since it is smaller than the sum of its proper divisors (5935008683520).

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

1778666158080 is a wasteful number, since it uses less digits than its factorization.

1778666158080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 63.

The spelling of 1778666158080 in words is "one trillion, seven hundred seventy-eight billion, six hundred sixty-six million, one hundred fifty-eight thousand, eighty".