6925664240 has 80 divisors (see below), whose sum is σ = 17994535776. Its totient is φ = 2456985600.

The previous prime is 6925664209. The next prime is 6925664243. The reversal of 6925664240 is 424665296.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 6925664191 and 6925664200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6925664243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59897 + ... + 132056.

Almost surely, 2^6925664240 is an apocalyptic number.

It is an amenable number.

6925664240 is an abundant number, since it is smaller than the sum of its proper divisors (11068871536).

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

6925664240 is a wasteful number, since it uses less digits than its factorization.

6925664240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192018 (or 192012 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 6925664240 is about 83220.5758211273. The cubic root of 6925664240 is about 1906.1356808412.

The spelling of 6925664240 in words is "six billion, nine hundred twenty-five million, six hundred sixty-four thousand, two hundred forty".