7421851668506 has 8 divisors (see below), whose sum is σ = 12144848184864. Its totient is φ = 3373568940220.

The previous prime is 7421851668449. The next prime is 7421851668527. The reversal of 7421851668506 is 6058661581247.

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

It is a super-2 number, since 2×7421851668506² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168678446990 + ... + 168678447033.

It is an arithmetic number, because the mean of its divisors is an integer number (1518106023108).

Almost surely, 2^{7421851668506} is an apocalyptic number.

7421851668506 is a deficient number, since it is larger than the sum of its proper divisors (4722996516358).

7421851668506 is a wasteful number, since it uses less digits than its factorization.

7421851668506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337356894036.

The product of its (nonzero) digits is 19353600, while the sum is 59.

The spelling of 7421851668506 in words is "seven trillion, four hundred twenty-one billion, eight hundred fifty-one million, six hundred sixty-eight thousand, five hundred six".