1670669 has 16 divisors (see below), whose sum is σ = 2244480. Its totient is φ = 1200960.

The previous prime is 1670659. The next prime is 1670687. The reversal of 1670669 is 9660761.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1670669 - 2⁴ = 1670653 is a prime.

It is a super-2 number, since 2×1670669² = 5582269815122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167 + ... + 1835.

It is an arithmetic number, because the mean of its divisors is an integer number (140280).

2^1670669 is an apocalyptic number.

It is an amenable number.

1670669 is a deficient number, since it is larger than the sum of its proper divisors (573811).

1670669 is a wasteful number, since it uses less digits than its factorization.

1670669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 1670669 is about 1292.5436162853. The cubic root of 1670669 is about 118.6579400995.

The spelling of 1670669 in words is "one million, six hundred seventy thousand, six hundred sixty-nine".