1866056141 has 2 divisors, whose sum is σ = 1866056142. Its totient is φ = 1866056140.

The previous prime is 1866056117. The next prime is 1866056167. The reversal of 1866056141 is 1416506681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1844702500 + 21353641 = 42950^2 + 4621^2 .

It is a cyclic number.

It is not a de Polignac number, because 1866056141 - 2¹⁸ = 1865793997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1866056095 and 1866056104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1866056741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933028070 + 933028071.

It is an arithmetic number, because the mean of its divisors is an integer number (933028071).

Almost surely, 2^1866056141 is an apocalyptic number.

It is an amenable number.

1866056141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1866056141 is an equidigital number, since it uses as much as digits as its factorization.

1866056141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 1866056141 is about 43197.8719499005. The cubic root of 1866056141 is about 1231.1422488921.

The spelling of 1866056141 in words is "one billion, eight hundred sixty-six million, fifty-six thousand, one hundred forty-one".