1366663550 has 24 divisors (see below), whose sum is σ = 2905136976. Its totient is φ = 468570240.

The previous prime is 1366663517. The next prime is 1366663553. The reversal of 1366663550 is 553666631.

It is a junction number, because it is equal to n+sod(n) for n = 1366663498 and 1366663507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366663553) 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 11 ways as a sum of consecutive naturals, for example, 1952027 + ... + 1952726.

It is an arithmetic number, because the mean of its divisors is an integer number (121047374).

Almost surely, 2^1366663550 is an apocalyptic number.

1366663550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1366663550 is an abundant number, since it is smaller than the sum of its proper divisors (1538473426).

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

1366663550 is a wasteful number, since it uses less digits than its factorization.

1366663550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3904772 (or 3904767 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 41.

The square root of 1366663550 is about 36968.4128682853. The cubic root of 1366663550 is about 1109.7382035518.

The spelling of 1366663550 in words is "one billion, three hundred sixty-six million, six hundred sixty-three thousand, five hundred fifty".