1006646081 has 4 divisors (see below), whose sum is σ = 1150452672. Its totient is φ = 862839492.

The previous prime is 1006646029. The next prime is 1006646099. The reversal of 1006646081 is 1806466001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1806466001 = 151 ⋅11963351.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1006646081 is a prime.

It is a super-2 number, since 2×1006646081² = 2026672664785317122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1006646021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71903285 + ... + 71903298.

It is an arithmetic number, because the mean of its divisors is an integer number (287613168).

Almost surely, 2^1006646081 is an apocalyptic number.

It is an amenable number.

1006646081 is a deficient number, since it is larger than the sum of its proper divisors (143806591).

1006646081 is an equidigital number, since it uses as much as digits as its factorization.

1006646081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143806590.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1006646081 is about 31727.6863480462. The cubic root of 1006646081 is about 1002.2104705530.

The spelling of 1006646081 in words is "one billion, six million, six hundred forty-six thousand, eighty-one".