1366428081 has 8 divisors (see below), whose sum is σ = 1823148544. Its totient is φ = 910329840.

The previous prime is 1366428079. The next prime is 1366428103. The reversal of 1366428081 is 1808246631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1366428081 - 2¹ = 1366428079 is a prime.

It is a super-2 number, since 2×1366428081² = 3734251401090685122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1366428001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150406 + ... + 159231.

It is an arithmetic number, because the mean of its divisors is an integer number (227893568).

Almost surely, 2^1366428081 is an apocalyptic number.

It is an amenable number.

1366428081 is a deficient number, since it is larger than the sum of its proper divisors (456720463).

1366428081 is a wasteful number, since it uses less digits than its factorization.

1366428081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311111.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 1366428081 is about 36965.2279987558. The cubic root of 1366428081 is about 1109.6744658567.

The spelling of 1366428081 in words is "one billion, three hundred sixty-six million, four hundred twenty-eight thousand, eighty-one".