1066644851 has 2 divisors, whose sum is σ = 1066644852. Its totient is φ = 1066644850.

The previous prime is 1066644827. The next prime is 1066644871. The reversal of 1066644851 is 1584466601.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1066644851 is a prime.

It is a super-2 number, since 2×1066644851² = 2275462476329624402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1066644799 and 1066644808.

It is not a weakly prime, because it can be changed into another prime (1066644871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533322425 + 533322426.

It is an arithmetic number, because the mean of its divisors is an integer number (533322426).

Almost surely, 2^1066644851 is an apocalyptic number.

1066644851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066644851 is an equidigital number, since it uses as much as digits as its factorization.

1066644851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 1066644851 is about 32659.5292525780. The cubic root of 1066644851 is about 1021.7389441643.

The spelling of 1066644851 in words is "one billion, sixty-six million, six hundred forty-four thousand, eight hundred fifty-one".