6420768487 has 8 divisors (see below), whose sum is σ = 7342851456. Its totient is φ = 5499893112.

The previous prime is 6420768467. The next prime is 6420768521. The reversal of 6420768487 is 7848670246.

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

It is not a de Polignac number, because 6420768487 - 2⁷ = 6420768359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420768467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290473 + ... + 311794.

It is an arithmetic number, because the mean of its divisors is an integer number (917856432).

Almost surely, 2^6420768487 is an apocalyptic number.

6420768487 is a deficient number, since it is larger than the sum of its proper divisors (922082969).

6420768487 is a wasteful number, since it uses less digits than its factorization.

6420768487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603797.

The product of its (nonzero) digits is 3612672, while the sum is 52.

The square root of 6420768487 is about 80129.6979090774. The cubic root of 6420768487 is about 1858.6416728439.

The spelling of 6420768487 in words is "six billion, four hundred twenty million, seven hundred sixty-eight thousand, four hundred eighty-seven".