6660515340 has 72 divisors (see below), whose sum is σ = 21392017920. Its totient is φ = 1671657984.

The previous prime is 6660515327. The next prime is 6660515363. The reversal of 6660515340 is 435150666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6660515295 and 6660515304.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1085260 + ... + 1091379.

It is an arithmetic number, because the mean of its divisors is an integer number (297111360).

Almost surely, 2^6660515340 is an apocalyptic number.

6660515340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6660515340 is an abundant number, since it is smaller than the sum of its proper divisors (14731502580).

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

6660515340 is a wasteful number, since it uses less digits than its factorization.

6660515340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2176671 (or 2176666 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 6660515340 is about 81611.9803705314. The cubic root of 6660515340 is about 1881.4930176304.

The spelling of 6660515340 in words is "six billion, six hundred sixty million, five hundred fifteen thousand, three hundred forty".