1668951 has 8 divisors (see below), whose sum is σ = 2472560. Its totient is φ = 1112616.

The previous prime is 1668943. The next prime is 1668971. The reversal of 1668951 is 1598661.

It is not a de Polignac number, because 1668951 - 2³ = 1668943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30880 + ... + 30933.

It is an arithmetic number, because the mean of its divisors is an integer number (309070).

2^1668951 is an apocalyptic number.

1668951 is a deficient number, since it is larger than the sum of its proper divisors (803609).

1668951 is an equidigital number, since it uses as much as digits as its factorization.

1668951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61822 (or 61816 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1668951 is about 1291.8788642903. The cubic root of 1668951 is about 118.6172529541.

The spelling of 1668951 in words is "one million, six hundred sixty-eight thousand, nine hundred fifty-one".