1066551823 has 2 divisors, whose sum is σ = 1066551824. Its totient is φ = 1066551822.

The previous prime is 1066551803. The next prime is 1066551839. The reversal of 1066551823 is 3281556601.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1066551823 is a prime.

It is a super-2 number, since 2×1066551823² = 2275065582289246658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066551803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533275911 + 533275912.

It is an arithmetic number, because the mean of its divisors is an integer number (533275912).

Almost surely, 2^1066551823 is an apocalyptic number.

1066551823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066551823 is an equidigital number, since it uses as much as digits as its factorization.

1066551823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 1066551823 is about 32658.1050123855. The cubic root of 1066551823 is about 1021.7092394649.

The spelling of 1066551823 in words is "one billion, sixty-six million, five hundred fifty-one thousand, eight hundred twenty-three".