1366551660450 has 144 divisors (see below), whose sum is σ = 3566380754880. Its totient is φ = 345880429440.

The previous prime is 1366551660433. The next prime is 1366551660497. The reversal of 1366551660450 is 540661556631.

It is a self number, because there is not a number n which added to its sum of digits gives 1366551660450.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 15097227 + ... + 15187473.

It is an arithmetic number, because the mean of its divisors is an integer number (24766533020).

Almost surely, 2^{1366551660450} is an apocalyptic number.

1366551660450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1366551660450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1783190377440).

1366551660450 is an abundant number, since it is smaller than the sum of its proper divisors (2199829094430).

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

1366551660450 is a wasteful number, since it uses less digits than its factorization.

1366551660450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90409 (or 90345 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 1366551660450 in words is "one trillion, three hundred sixty-six billion, five hundred fifty-one million, six hundred sixty thousand, four hundred fifty".