6907440021 has 8 divisors (see below), whose sum is σ = 9383692320. Its totient is φ = 4518073872.

The previous prime is 6907439989. The next prime is 6907440037. The reversal of 6907440021 is 1200447096.

It is a happy number.

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

It is not a de Polignac number, because 6907440021 - 2⁵ = 6907439989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6907440521) 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, 21721351 + ... + 21721668.

It is an arithmetic number, because the mean of its divisors is an integer number (1172961540).

Almost surely, 2^6907440021 is an apocalyptic number.

It is an amenable number.

6907440021 is a deficient number, since it is larger than the sum of its proper divisors (2476252299).

6907440021 is a wasteful number, since it uses less digits than its factorization.

6907440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43443075.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 6907440021 is about 83111.0102272858. The cubic root of 6907440021 is about 1904.4622746396.

The spelling of 6907440021 in words is "six billion, nine hundred seven million, four hundred forty thousand, twenty-one".