1207666 has 4 divisors (see below), whose sum is σ = 1811502. Its totient is φ = 603832.

The previous prime is 1207649. The next prime is 1207681. The reversal of 1207666 is 6667021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6667021 = 43 ⋅155047.

It can be written as a sum of positive squares in only one way, i.e., 1134225 + 73441 = 1065^2 + 271^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301915 + ... + 301918.

2^1207666 is an apocalyptic number.

1207666 is a deficient number, since it is larger than the sum of its proper divisors (603836).

1207666 is an equidigital number, since it uses as much as digits as its factorization.

1207666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603835.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 1207666 is about 1098.9385788114. The cubic root of 1207666 is about 106.4916639937.

The spelling of 1207666 in words is "one million, two hundred seven thousand, six hundred sixty-six".