1066651648 has 26 divisors (see below), whose sum is σ = 2133051074. Its totient is φ = 533323776.

The previous prime is 1066651637. The next prime is 1066651669. The reversal of 1066651648 is 8461566601.

It can be written as a sum of positive squares in only one way, i.e., 1052872704 + 13778944 = 32448^2 + 3712^2 .

It is a super-2 number, since 2×1066651648² = 2275491476362231808, 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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126111 + ... + 134302.

Almost surely, 2^1066651648 is an apocalyptic number.

It is an amenable number.

1066651648 is a deficient number, since it is larger than the sum of its proper divisors (1066399426).

1066651648 is an frugal number, since it uses more digits than its factorization.

1066651648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260437 (or 260415 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 1066651648 is about 32659.6333108625. The cubic root of 1066651648 is about 1021.7411144414.

The spelling of 1066651648 in words is "one billion, sixty-six million, six hundred fifty-one thousand, six hundred forty-eight".