1670664 has 32 divisors (see below), whose sum is σ = 4213440. Its totient is φ = 552000.

The previous prime is 1670659. The next prime is 1670687. The reversal of 1670664 is 4660761.

It is a super-2 number, since 2×1670664² = 5582236401792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3394 + ... + 3854.

It is an arithmetic number, because the mean of its divisors is an integer number (131670).

2^1670664 is an apocalyptic number.

It is an amenable number.

1670664 is an abundant number, since it is smaller than the sum of its proper divisors (2542776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1670664 is a wasteful number, since it uses less digits than its factorization.

1670664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 1670664 is about 1292.5416821132. The cubic root of 1670664 is about 118.6578217257.

The spelling of 1670664 in words is "one million, six hundred seventy thousand, six hundred sixty-four".