1366642634 has 12 divisors (see below), whose sum is σ = 2384652114. Its totient is φ = 585703944.

The previous prime is 1366642633. The next prime is 1366642637. The reversal of 1366642634 is 4362466631.

It can be written as a sum of positive squares in only one way, i.e., 1260037009 + 106605625 = 35497^2 + 10325^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1366642591 and 1366642600.

It is not an unprimeable number, because it can be changed into a prime (1366642633) 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 5 ways as a sum of consecutive naturals, for example, 6972569 + ... + 6972764.

Almost surely, 2^1366642634 is an apocalyptic number.

1366642634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1366642634 is a deficient number, since it is larger than the sum of its proper divisors (1018009480).

1366642634 is a wasteful number, since it uses less digits than its factorization.

1366642634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13945349 (or 13945342 counting only the distinct ones).

The product of its digits is 373248, while the sum is 41.

The square root of 1366642634 is about 36968.1299770492. The cubic root of 1366642634 is about 1109.7325422211.

The spelling of 1366642634 in words is "one billion, three hundred sixty-six million, six hundred forty-two thousand, six hundred thirty-four".