1366620040 has 32 divisors (see below), whose sum is σ = 3075975000. Its totient is φ = 546456064.

The previous prime is 1366620029. The next prime is 1366620067. The reversal of 1366620040 is 400266631.

It can be written as a sum of positive squares in 4 ways, for example, as 1363529476 + 3090564 = 36926^2 + 1758^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1366619990 and 1366620008.

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, 182286 + ... + 189634.

Almost surely, 2^1366620040 is an apocalyptic number.

1366620040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1366620040 is an abundant number, since it is smaller than the sum of its proper divisors (1709354960).

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

1366620040 is a wasteful number, since it uses less digits than its factorization.

1366620040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12009 (or 12005 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1366620040 is about 36967.8243882434. The cubic root of 1366620040 is about 1109.7264266416.

Adding to 1366620040 its reverse (400266631), we get a palindrome (1766886671).

The spelling of 1366620040 in words is "one billion, three hundred sixty-six million, six hundred twenty thousand, forty".