1662241541 has 2 divisors, whose sum is σ = 1662241542. Its totient is φ = 1662241540.

The previous prime is 1662241507. The next prime is 1662241547. The reversal of 1662241541 is 1451422661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1652097316 + 10144225 = 40646^2 + 3185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1662241541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1662241498 and 1662241507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662241547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831120770 + 831120771.

It is an arithmetic number, because the mean of its divisors is an integer number (831120771).

Almost surely, 2^1662241541 is an apocalyptic number.

It is an amenable number.

1662241541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662241541 is an equidigital number, since it uses as much as digits as its factorization.

1662241541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 1662241541 is about 40770.5965249467. The cubic root of 1662241541 is about 1184.5808581321.

The spelling of 1662241541 in words is "one billion, six hundred sixty-two million, two hundred forty-one thousand, five hundred forty-one".