6651695340 has 36 divisors (see below), whose sum is σ = 20176809744. Its totient is φ = 1773785376.

The previous prime is 6651695333. The next prime is 6651695371. The reversal of 6651695340 is 435961566.

6651695340 is a `hidden beast` number, since 6 + 6 + 51 + 69 + 534 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 18476752 + ... + 18477111.

Almost surely, 2^6651695340 is an apocalyptic number.

6651695340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6651695340 is an abundant number, since it is smaller than the sum of its proper divisors (13525114404).

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

6651695340 is a wasteful number, since it uses less digits than its factorization.

6651695340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36953878 (or 36953873 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The square root of 6651695340 is about 81557.9262855549. The cubic root of 6651695340 is about 1880.6621460430.

The spelling of 6651695340 in words is "six billion, six hundred fifty-one million, six hundred ninety-five thousand, three hundred forty".