1662611 has 2 divisors, whose sum is σ = 1662612. Its totient is φ = 1662610.

The previous prime is 1662593. The next prime is 1662629. The reversal of 1662611 is 1162661.

It is a balanced prime because it is at equal distance from previous prime (1662593) and next prime (1662629).

It is a cyclic number.

It is not a de Polignac number, because 1662611 - 2⁶ = 1662547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1662631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831305 + 831306.

It is an arithmetic number, because the mean of its divisors is an integer number (831306).

2^1662611 is an apocalyptic number.

1662611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662611 is an equidigital number, since it uses as much as digits as its factorization.

1662611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 1662611 is about 1289.4227390581. The cubic root of 1662611 is about 118.4668615462.

The spelling of 1662611 in words is "one million, six hundred sixty-two thousand, six hundred eleven".