1366066251 has 48 divisors (see below), whose sum is σ = 2189566080. Its totient is φ = 813816960.

The previous prime is 1366066223. The next prime is 1366066271. The reversal of 1366066251 is 1526606631.

It is not a de Polignac number, because 1366066251 - 2⁹ = 1366065739 is a prime.

It is a super-2 number, since 2×1366066251² = 3732274004242390002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1366066201) 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 47 ways as a sum of consecutive naturals, for example, 1999756 + ... + 2000438.

It is an arithmetic number, because the mean of its divisors is an integer number (45615960).

Almost surely, 2^1366066251 is an apocalyptic number.

1366066251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1366066251 is a deficient number, since it is larger than the sum of its proper divisors (823499829).

1366066251 is a wasteful number, since it uses less digits than its factorization.

1366066251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016 (or 1013 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1366066251 is about 36960.3334806384. Note that the first 3 decimals coincide. The cubic root of 1366066251 is about 1109.5765099860.

The spelling of 1366066251 in words is "one billion, three hundred sixty-six million, sixty-six thousand, two hundred fifty-one".