1006697661 has 8 divisors (see below), whose sum is σ = 1344934080. Its totient is φ = 669796512.

The previous prime is 1006697647. The next prime is 1006697663. The reversal of 1006697661 is 1667966001.

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

It is not a de Polignac number, because 1006697661 - 2²² = 1002503357 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006697663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332056 + ... + 335073.

It is an arithmetic number, because the mean of its divisors is an integer number (168116760).

Almost surely, 2^1006697661 is an apocalyptic number.

It is an amenable number.

1006697661 is a deficient number, since it is larger than the sum of its proper divisors (338236419).

1006697661 is an equidigital number, since it uses as much as digits as its factorization.

1006697661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667635.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 1006697661 is about 31728.4991923665. The cubic root of 1006697661 is about 1002.2275878346.

The spelling of 1006697661 in words is "one billion, six million, six hundred ninety-seven thousand, six hundred sixty-one".