666279488 has 28 divisors (see below), whose sum is σ = 1511027712. Its totient is φ = 285548160.

The previous prime is 666279469. The next prime is 666279491. The reversal of 666279488 is 884972666.

It is a happy number.

666279488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×666279488² = 887856712259084288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743168 + ... + 744063.

Almost surely, 2^666279488 is an apocalyptic number.

It is an amenable number.

666279488 is an abundant number, since it is smaller than the sum of its proper divisors (844748224).

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

666279488 is a wasteful number, since it uses less digits than its factorization.

666279488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487250 (or 1487240 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 56.

The square root of 666279488 is about 25812.3902031563. The cubic root of 666279488 is about 873.4113161269.

The spelling of 666279488 in words is "six hundred sixty-six million, two hundred seventy-nine thousand, four hundred eighty-eight".