6940218407 has 8 divisors (see below), whose sum is σ = 7306950960. Its totient is φ = 6573631680.

The previous prime is 6940218377. The next prime is 6940218419. The reversal of 6940218407 is 7048120496.

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 6940218407 - 2⁶ = 6940218343 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 (6940218497) 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, 69107 + ... + 136587.

It is an arithmetic number, because the mean of its divisors is an integer number (913368870).

Almost surely, 2^6940218407 is an apocalyptic number.

6940218407 is a deficient number, since it is larger than the sum of its proper divisors (366732553).

6940218407 is a wasteful number, since it uses less digits than its factorization.

6940218407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72913.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 6940218407 is about 83307.9732498637. The cubic root of 6940218407 is about 1907.4699839709.

The spelling of 6940218407 in words is "six billion, nine hundred forty million, two hundred eighteen thousand, four hundred seven".