6651142507 has 4 divisors (see below), whose sum is σ = 6940322640. Its totient is φ = 6361962376.

The previous prime is 6651142453. The next prime is 6651142517. The reversal of 6651142507 is 7052411566.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6651142507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6651142517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144590032 + ... + 144590077.

It is an arithmetic number, because the mean of its divisors is an integer number (1735080660).

Almost surely, 2^6651142507 is an apocalyptic number.

6651142507 is a deficient number, since it is larger than the sum of its proper divisors (289180133).

6651142507 is a wasteful number, since it uses less digits than its factorization.

6651142507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289180132.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 6651142507 is about 81554.5370105183. The cubic root of 6651142507 is about 1880.6100429901.

The spelling of 6651142507 in words is "six billion, six hundred fifty-one million, one hundred forty-two thousand, five hundred seven".