678414064221 has 16 divisors (see below), whose sum is σ = 1005231899520. Its totient is φ = 452197730880.

The previous prime is 678414064183. The next prime is 678414064259. The reversal of 678414064221 is 122460414876.

678414064221 is a `hidden beast` number, since 6 + 7 + 8 + 414 + 0 + 6 + 4 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (678414064183) and next prime (678414064259).

It is not a de Polignac number, because 678414064221 - 2¹³ = 678414056029 is a prime.

It is a super-2 number, since 2×678414064221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678414024221) 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, 2016300 + ... + 2328581.

It is an arithmetic number, because the mean of its divisors is an integer number (62826993720).

Almost surely, 2^678414064221 is an apocalyptic number.

It is an amenable number.

678414064221 is a deficient number, since it is larger than the sum of its proper divisors (326817835299).

678414064221 is a wasteful number, since it uses less digits than its factorization.

678414064221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4350673 (or 4350667 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 678414064221 in words is "six hundred seventy-eight billion, four hundred fourteen million, sixty-four thousand, two hundred twenty-one".