1361823666 has 16 divisors (see below), whose sum is σ = 3112739904. Its totient is φ = 389092464.

The previous prime is 1361823653. The next prime is 1361823679. The reversal of 1361823666 is 6663281631.

1361823666 is digitally balanced in base 4, 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 (1361823653) and next prime (1361823679).

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 32424373 = 1361823666 / (1 + 3 + 6 + 1 + 8 + 2 + 3 + 6 + 6 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16212145 + ... + 16212228.

It is an arithmetic number, because the mean of its divisors is an integer number (194546244).

Almost surely, 2^1361823666 is an apocalyptic number.

1361823666 is an abundant number, since it is smaller than the sum of its proper divisors (1750916238).

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

1361823666 is a wasteful number, since it uses less digits than its factorization.

1361823666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32424385.

The product of its digits is 186624, while the sum is 42.

The square root of 1361823666 is about 36902.8950896810. The cubic root of 1361823666 is about 1108.4266500860.

The spelling of 1361823666 in words is "one billion, three hundred sixty-one million, eight hundred twenty-three thousand, six hundred sixty-six".