1066071663 has 6 divisors (see below), whose sum is σ = 1539881304. Its totient is φ = 710714436.

The previous prime is 1066071661. The next prime is 1066071701. The reversal of 1066071663 is 3661706601.

It is not a de Polignac number, because 1066071663 - 2¹ = 1066071661 is a prime.

It is a super-2 number, since 2×1066071663² = 2273017581303171138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066071661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59226195 + ... + 59226212.

It is an arithmetic number, because the mean of its divisors is an integer number (256646884).

Almost surely, 2^1066071663 is an apocalyptic number.

1066071663 is a deficient number, since it is larger than the sum of its proper divisors (473809641).

1066071663 is a wasteful number, since it uses less digits than its factorization.

1066071663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118452413 (or 118452410 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 1066071663 is about 32650.7528703398. The cubic root of 1066071663 is about 1021.5558924712. Note that the first 3 decimals are identical.

The spelling of 1066071663 in words is "one billion, sixty-six million, seventy-one thousand, six hundred sixty-three".