6660697438 has 8 divisors (see below), whose sum is σ = 10335565080. Its totient is φ = 3215509080.

The previous prime is 6660697391. The next prime is 6660697441. The reversal of 6660697438 is 8347960666.

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

It is a super-3 number, since 3×6660697438³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

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, 57419748 + ... + 57419863.

It is an arithmetic number, because the mean of its divisors is an integer number (1291945635).

Almost surely, 2^6660697438 is an apocalyptic number.

6660697438 is a deficient number, since it is larger than the sum of its proper divisors (3674867642).

6660697438 is a wasteful number, since it uses less digits than its factorization.

6660697438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114839642.

The product of its (nonzero) digits is 7838208, while the sum is 55.

The square root of 6660697438 is about 81613.0959956795. The cubic root of 6660697438 is about 1881.5101641011.

The spelling of 6660697438 in words is "six billion, six hundred sixty million, six hundred ninety-seven thousand, four hundred thirty-eight".