1660722 has 16 divisors (see below), whose sum is σ = 3796032. Its totient is φ = 474480.

The previous prime is 1660721. The next prime is 1660723. The reversal of 1660722 is 2270661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1660721) and next prime (1660723).

It is a super-2 number, since 2×1660722² = 5515995122568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1660692 and 1660701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19729 + ... + 19812.

It is an arithmetic number, because the mean of its divisors is an integer number (237252).

2^1660722 is an apocalyptic number.

1660722 is an abundant number, since it is smaller than the sum of its proper divisors (2135310).

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

1660722 is a wasteful number, since it uses less digits than its factorization.

1660722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39553.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1660722 is about 1288.6900325524. The cubic root of 1660722 is about 118.4219785867.

The spelling of 1660722 in words is "one million, six hundred sixty thousand, seven hundred twenty-two".