6660440402 has 24 divisors (see below), whose sum is σ = 12550254528. Its totient is φ = 2594976120.

The previous prime is 6660440399. The next prime is 6660440429. The reversal of 6660440402 is 2040440666.

It is a super-2 number, since 2×6660440402² = 88722932697187843208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1964198 + ... + 1967585.

It is an arithmetic number, because the mean of its divisors is an integer number (522927272).

Almost surely, 2^6660440402 is an apocalyptic number.

6660440402 is a deficient number, since it is larger than the sum of its proper divisors (5889814126).

6660440402 is a wasteful number, since it uses less digits than its factorization.

6660440402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931814 (or 3931803 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 6660440402 is about 81611.5212577244. The cubic root of 6660440402 is about 1881.4859613269.

The spelling of 6660440402 in words is "six billion, six hundred sixty million, four hundred forty thousand, four hundred two".