1356666 has 16 divisors (see below), whose sum is σ = 2731104. Its totient is φ = 449264.

The previous prime is 1356659. The next prime is 1356671. The reversal of 1356666 is 6666531.

It is a plaindrome in base 10.

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, 385 + ... + 1691.

It is an arithmetic number, because the mean of its divisors is an integer number (170694).

2^1356666 is an apocalyptic number.

1356666 is an abundant number, since it is smaller than the sum of its proper divisors (1374438).

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

1356666 is a wasteful number, since it uses less digits than its factorization.

1356666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485.

The product of its digits is 19440, while the sum is 33.

The square root of 1356666 is about 1164.7600611285. The cubic root of 1356666 is about 110.7025556573.

The spelling of 1356666 in words is "one million, three hundred fifty-six thousand, six hundred sixty-six".