6651923478 has 8 divisors (see below), whose sum is σ = 13303846968. Its totient is φ = 2217307824.

The previous prime is 6651923471. The next prime is 6651923479. The reversal of 6651923478 is 8743291566.

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

6651923478 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 6651923478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651923471) 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, 554326951 + ... + 554326962.

It is an arithmetic number, because the mean of its divisors is an integer number (1662980871).

Almost surely, 2^6651923478 is an apocalyptic number.

6651923478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6651923478 is a wasteful number, since it uses less digits than its factorization.

6651923478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108653918.

The product of its digits is 2177280, while the sum is 51.

The square root of 6651923478 is about 81559.3248991187. The cubic root of 6651923478 is about 1880.6836466065.

The spelling of 6651923478 in words is "six billion, six hundred fifty-one million, nine hundred twenty-three thousand, four hundred seventy-eight".