1366549020 has 72 divisors (see below), whose sum is σ = 4288152960. Its totient is φ = 351845760.

The previous prime is 1366549007. The next prime is 1366549039. The reversal of 1366549020 is 209456631.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125676 + ... + 136115.

It is an arithmetic number, because the mean of its divisors is an integer number (59557680).

Almost surely, 2^1366549020 is an apocalyptic number.

1366549020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1366549020 is an abundant number, since it is smaller than the sum of its proper divisors (2921603940).

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

1366549020 is a wasteful number, since it uses less digits than its factorization.

1366549020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261835 (or 261830 counting only the distinct ones).

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

The square root of 1366549020 is about 36966.8638107157. The cubic root of 1366549020 is about 1109.7072030257.

The spelling of 1366549020 in words is "one billion, three hundred sixty-six million, five hundred forty-nine thousand, twenty".