1066645456 has 10 divisors (see below), whose sum is σ = 2066625602. Its totient is φ = 533322720.

The previous prime is 1066645429. The next prime is 1066645477. The reversal of 1066645456 is 6545466601.

It can be written as a sum of positive squares in only one way, i.e., 1061717056 + 4928400 = 32584^2 + 2220^2 .

It is a super-2 number, since 2×1066645456² = 2275465057610895872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33332655 + ... + 33332686.

Almost surely, 2^1066645456 is an apocalyptic number.

1066645456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1066645456 is a deficient number, since it is larger than the sum of its proper divisors (999980146).

1066645456 is an equidigital number, since it uses as much as digits as its factorization.

1066645456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66665349 (or 66665343 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The square root of 1066645456 is about 32659.5385148045. The cubic root of 1066645456 is about 1021.7391373407.

The spelling of 1066645456 in words is "one billion, sixty-six million, six hundred forty-five thousand, four hundred fifty-six".