1670667 has 8 divisors (see below), whose sum is σ = 2235024. Its totient is φ = 1110048.

The previous prime is 1670659. The next prime is 1670687. The reversal of 1670667 is 7660761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1670667 - 2³ = 1670659 is a prime.

It is a super-2 number, since 2×1670667² = 5582256449778, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

1670667 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1670657) 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, 373 + ... + 1865.

It is an arithmetic number, because the mean of its divisors is an integer number (279378).

2^1670667 is an apocalyptic number.

1670667 is a deficient number, since it is larger than the sum of its proper divisors (564357).

1670667 is a wasteful number, since it uses less digits than its factorization.

1670667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 1670667 is about 1292.5428426168. The cubic root of 1670667 is about 118.6578927500.

The spelling of 1670667 in words is "one million, six hundred seventy thousand, six hundred sixty-seven".