7023643661 has 8 divisors (see below), whose sum is σ = 7270111800. Its totient is φ = 6777460480.

The previous prime is 7023643591. The next prime is 7023643709. The reversal of 7023643661 is 1663463207.

It can be written as a sum of positive squares in 4 ways, for example, as 3720268036 + 3303375625 = 60994^2 + 57475^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7023643661 - 2¹⁸ = 7023381517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7023643261) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 20456 + ... + 120273.

It is an arithmetic number, because the mean of its divisors is an integer number (908763975).

Almost surely, 2^7023643661 is an apocalyptic number.

It is an amenable number.

7023643661 is a deficient number, since it is larger than the sum of its proper divisors (246468139).

7023643661 is a wasteful number, since it uses less digits than its factorization.

7023643661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142479.

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 7023643661 is about 83807.1814404947. The cubic root of 7023643661 is about 1915.0825098804.

The spelling of 7023643661 in words is "seven billion, twenty-three million, six hundred forty-three thousand, six hundred sixty-one".