6651430405 has 8 divisors (see below), whose sum is σ = 8091055512. Its totient is φ = 5248251648.

The previous prime is 6651430403. The next prime is 6651430433. The reversal of 6651430405 is 5040341566.

It can be written as a sum of positive squares in 4 ways, for example, as 2569881636 + 4081548769 = 50694^2 + 63887^2 .

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 6651430405 - 2¹ = 6651430403 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 (6651430403) 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, 9111184 + ... + 9111913.

It is an arithmetic number, because the mean of its divisors is an integer number (1011381939).

Almost surely, 2^6651430405 is an apocalyptic number.

It is an amenable number.

6651430405 is a deficient number, since it is larger than the sum of its proper divisors (1439625107).

6651430405 is a wasteful number, since it uses less digits than its factorization.

6651430405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18223175.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 6651430405 is about 81556.3020556965. The cubic root of 6651430405 is about 1880.6371769779.

The spelling of 6651430405 in words is "six billion, six hundred fifty-one million, four hundred thirty thousand, four hundred five".