1066421505 has 8 divisors (see below), whose sum is σ = 1706274432. Its totient is φ = 568758128.

The previous prime is 1066421497. The next prime is 1066421527. The reversal of 1066421505 is 5051246601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1066421505 - 2³ = 1066421497 is a prime.

It is a super-2 number, since 2×1066421505² = 2274509652652930050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35547369 + ... + 35547398.

It is an arithmetic number, because the mean of its divisors is an integer number (213284304).

Almost surely, 2^1066421505 is an apocalyptic number.

1066421505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1066421505 is a deficient number, since it is larger than the sum of its proper divisors (639852927).

1066421505 is an equidigital number, since it uses as much as digits as its factorization.

1066421505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71094775.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1066421505 is about 32656.1097652491. The cubic root of 1066421505 is about 1021.6676248194.

The spelling of 1066421505 in words is "one billion, sixty-six million, four hundred twenty-one thousand, five hundred five".