6651468977 has 4 divisors (see below), whose sum is σ = 7042731876. Its totient is φ = 6260206080.

The previous prime is 6651468961. The next prime is 6651468983. The reversal of 6651468977 is 7798641566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5404602256 + 1246866721 = 73516^2 + 35311^2 .

It is a cyclic number.

It is not a de Polignac number, because 6651468977 - 2⁴ = 6651468961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6651468937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195631424 + ... + 195631457.

It is an arithmetic number, because the mean of its divisors is an integer number (1760682969).

Almost surely, 2^6651468977 is an apocalyptic number.

It is an amenable number.

6651468977 is a deficient number, since it is larger than the sum of its proper divisors (391262899).

6651468977 is a wasteful number, since it uses less digits than its factorization.

6651468977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391262898.

The product of its digits is 15240960, while the sum is 59.

The square root of 6651468977 is about 81556.5385300284. The cubic root of 6651468977 is about 1880.6408122760.

The spelling of 6651468977 in words is "six billion, six hundred fifty-one million, four hundred sixty-eight thousand, nine hundred seventy-seven".