1366626540 has 48 divisors (see below), whose sum is σ = 3872671488. Its totient is φ = 360041664.

The previous prime is 1366626539. The next prime is 1366626587. The reversal of 1366626540 is 456266631.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132232 + ... + 142191.

It is an arithmetic number, because the mean of its divisors is an integer number (80680656).

Almost surely, 2^1366626540 is an apocalyptic number.

1366626540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1366626540 is an abundant number, since it is smaller than the sum of its proper divisors (2506044948).

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

1366626540 is a wasteful number, since it uses less digits than its factorization.

1366626540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274518 (or 274516 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 1366626540 is about 36967.9123024279. The cubic root of 1366626540 is about 1109.7281860212.

The spelling of 1366626540 in words is "one billion, three hundred sixty-six million, six hundred twenty-six thousand, five hundred forty".