1660744 has 8 divisors (see below), whose sum is σ = 3113910. Its totient is φ = 830368.

The previous prime is 1660741. The next prime is 1660751. The reversal of 1660744 is 4470661.

It can be written as a sum of positive squares in only one way, i.e., 1127844 + 532900 = 1062^2 + 730^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×1660744³ = 13741347768663332352, which contains 333 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1660741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103789 + ... + 103804.

2^1660744 is an apocalyptic number.

It is an amenable number.

1660744 is a deficient number, since it is larger than the sum of its proper divisors (1453166).

1660744 is a wasteful number, since it uses less digits than its factorization.

1660744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207599 (or 207595 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1660744 is about 1288.6985683239. The cubic root of 1660744 is about 118.4225015062.

The spelling of 1660744 in words is "one million, six hundred sixty thousand, seven hundred forty-four".