6664292478 has 24 divisors (see below), whose sum is σ = 14775099768. Its totient is φ = 2169769392.

The previous prime is 6664292477. The next prime is 6664292489. The reversal of 6664292478 is 8742924666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664292477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4304325 + ... + 4305872.

It is an arithmetic number, because the mean of its divisors is an integer number (615629157).

Almost surely, 2^6664292478 is an apocalyptic number.

6664292478 is an abundant number, since it is smaller than the sum of its proper divisors (8110807290).

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

6664292478 is a wasteful number, since it uses less digits than its factorization.

6664292478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8610248 (or 8610245 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 6664292478 is about 81635.1179211496. The cubic root of 6664292478 is about 1881.8486115273.

The spelling of 6664292478 in words is "six billion, six hundred sixty-four million, two hundred ninety-two thousand, four hundred seventy-eight".