1664698 has 8 divisors (see below), whose sum is σ = 2853792. Its totient is φ = 713436.

The previous prime is 1664681. The next prime is 1664701. The reversal of 1664698 is 8964661.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1664698.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59440 + ... + 59467.

It is an arithmetic number, because the mean of its divisors is an integer number (356724).

2^1664698 is an apocalyptic number.

1664698 is a deficient number, since it is larger than the sum of its proper divisors (1189094).

1664698 is a wasteful number, since it uses less digits than its factorization.

1664698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118916.

The product of its digits is 62208, while the sum is 40.

The square root of 1664698 is about 1290.2317621265. The cubic root of 1664698 is about 118.5164095087.

The spelling of 1664698 in words is "one million, six hundred sixty-four thousand, six hundred ninety-eight".