2066731 has 4 divisors (see below), whose sum is σ = 2110752. Its totient is φ = 2022712.

The previous prime is 2066723. The next prime is 2066759. The reversal of 2066731 is 1376602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2066731 - 2³ = 2066723 is a prime.

It is a super-2 number, since 2×2066731² = 8542754052722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2066696 and 2066705.

It is not an unprimeable number, because it can be changed into a prime (2066761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21940 + ... + 22033.

It is an arithmetic number, because the mean of its divisors is an integer number (527688).

2^2066731 is an apocalyptic number.

2066731 is a deficient number, since it is larger than the sum of its proper divisors (44021).

2066731 is an equidigital number, since it uses as much as digits as its factorization.

2066731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44020.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 2066731 is about 1437.6129520841. The cubic root of 2066731 is about 127.3780661768.

The spelling of 2066731 in words is "two million, sixty-six thousand, seven hundred thirty-one".