1664612 has 6 divisors (see below), whose sum is σ = 2913078. Its totient is φ = 832304.

The previous prime is 1664569. The next prime is 1664627. The reversal of 1664612 is 2164661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1653796 + 10816 = 1286^2 + 104^2 .

It is a super-2 number, since 2×1664612² = 5541866221088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208073 + ... + 208080.

It is an arithmetic number, because the mean of its divisors is an integer number (485513).

2^1664612 is an apocalyptic number.

It is an amenable number.

1664612 is a deficient number, since it is larger than the sum of its proper divisors (1248466).

1664612 is a wasteful number, since it uses less digits than its factorization.

1664612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416157 (or 416155 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 1664612 is about 1290.1984343503. The cubic root of 1664612 is about 118.5143685806.

The spelling of 1664612 in words is "one million, six hundred sixty-four thousand, six hundred twelve".