1966418 has 4 divisors (see below), whose sum is σ = 2949630. Its totient is φ = 983208.

The previous prime is 1966417. The next prime is 1966427. The reversal of 1966418 is 8146691.

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., 1423249 + 543169 = 1193^2 + 737^2 .

It is a plaindrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (1966417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491603 + ... + 491606.

2^1966418 is an apocalyptic number.

1966418 is a deficient number, since it is larger than the sum of its proper divisors (983212).

1966418 is an equidigital number, since it uses as much as digits as its factorization.

1966418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983211.

The product of its digits is 10368, while the sum is 35.

The square root of 1966418 is about 1402.2902695234. The cubic root of 1966418 is about 125.2829430626.

The spelling of 1966418 in words is "one million, nine hundred sixty-six thousand, four hundred eighteen".