5646322661 has 4 divisors (see below), whose sum is σ = 6452940192. Its totient is φ = 4839705132.

The previous prime is 5646322621. The next prime is 5646322673. The reversal of 5646322661 is 1662236465.

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: 1662236465 = 5 ⋅332447293.

It is a cyclic number.

It is not a de Polignac number, because 5646322661 - 2²⁶ = 5579213797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5646322621) 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, 403308755 + ... + 403308768.

It is an arithmetic number, because the mean of its divisors is an integer number (1613235048).

Almost surely, 2^5646322661 is an apocalyptic number.

It is an amenable number.

5646322661 is a deficient number, since it is larger than the sum of its proper divisors (806617531).

5646322661 is an equidigital number, since it uses as much as digits as its factorization.

5646322661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806617530.

The product of its digits is 311040, while the sum is 41.

The square root of 5646322661 is about 75142.0166152067. The cubic root of 5646322661 is about 1780.6910018630.

The spelling of 5646322661 in words is "five billion, six hundred forty-six million, three hundred twenty-two thousand, six hundred sixty-one".