1366001641 has 4 divisors (see below), whose sum is σ = 1366075984. Its totient is φ = 1365927300.

The previous prime is 1366001603. The next prime is 1366001677. The reversal of 1366001641 is 1461006631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1366001641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1366001341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12646 + ... + 53776.

It is an arithmetic number, because the mean of its divisors is an integer number (341518996).

Almost surely, 2^1366001641 is an apocalyptic number.

It is an amenable number.

1366001641 is a deficient number, since it is larger than the sum of its proper divisors (74343).

1366001641 is an equidigital number, since it uses as much as digits as its factorization.

1366001641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74342.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1366001641 is about 36959.4594251593. The cubic root of 1366001641 is about 1109.5590167230.

The spelling of 1366001641 in words is "one billion, three hundred sixty-six million, one thousand, six hundred forty-one".