1427666 has 4 divisors (see below), whose sum is σ = 2141502. Its totient is φ = 713832.

The previous prime is 1427663. The next prime is 1427681. The reversal of 1427666 is 6667241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 958441 + 469225 = 979^2 + 685^2 .

It is not an unprimeable number, because it can be changed into a prime (1427663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356915 + ... + 356918.

2^1427666 is an apocalyptic number.

1427666 is a deficient number, since it is larger than the sum of its proper divisors (713836).

1427666 is an equidigital number, since it uses as much as digits as its factorization.

1427666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713835.

The product of its digits is 12096, while the sum is 32.

The square root of 1427666 is about 1194.8497813533. The cubic root of 1427666 is about 112.6009891522.

The spelling of 1427666 in words is "one million, four hundred twenty-seven thousand, six hundred sixty-six".