1066645403 has 2 divisors, whose sum is σ = 1066645404. Its totient is φ = 1066645402.

The previous prime is 1066645379. The next prime is 1066645409. The reversal of 1066645403 is 3045466601.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1066645403 - 2²⁰ = 1065596827 is a prime.

It is a super-2 number, since 2×1066645403² = 2275464831482064818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1066645409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533322701 + 533322702.

It is an arithmetic number, because the mean of its divisors is an integer number (533322702).

Almost surely, 2^1066645403 is an apocalyptic number.

1066645403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066645403 is an equidigital number, since it uses as much as digits as its factorization.

1066645403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 1066645403 is about 32659.5377034030. The cubic root of 1066645403 is about 1021.7391204178.

The spelling of 1066645403 in words is "one billion, sixty-six million, six hundred forty-five thousand, four hundred three".