6507987421 has 8 divisors (see below), whose sum is σ = 7093044000. Its totient is φ = 5934994032.

The previous prime is 6507987371. The next prime is 6507987427. The reversal of 6507987421 is 1247897056.

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

It is a cyclic number.

It is not a de Polignac number, because 6507987421 - 2¹⁷ = 6507856349 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 (6507987427) 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, 3014671 + ... + 3016828.

It is an arithmetic number, because the mean of its divisors is an integer number (886630500).

Almost surely, 2^6507987421 is an apocalyptic number.

It is an amenable number.

6507987421 is a deficient number, since it is larger than the sum of its proper divisors (585056579).

6507987421 is a wasteful number, since it uses less digits than its factorization.

6507987421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6031595.

The product of its (nonzero) digits is 846720, while the sum is 49.

The square root of 6507987421 is about 80672.0981566737. The cubic root of 6507987421 is about 1867.0197049350.

The spelling of 6507987421 in words is "six billion, five hundred seven million, nine hundred eighty-seven thousand, four hundred twenty-one".