415878122666 has 8 divisors (see below), whose sum is σ = 627263688324. Its totient is φ = 206790226560.

The previous prime is 415878122663. The next prime is 415878122687. The reversal of 415878122666 is 666221878514.

It can be written as a sum of positive squares in 2 ways, for example, as 268329180025 + 147548942641 = 518005^2 + 384121^2 .

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

It is a super-2 number, since 2×415878122666² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (415878122663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574416935 + ... + 574417658.

Almost surely, 2^415878122666 is an apocalyptic number.

415878122666 is a deficient number, since it is larger than the sum of its proper divisors (211385565658).

415878122666 is a wasteful number, since it uses less digits than its factorization.

415878122666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148834776.

The product of its digits is 7741440, while the sum is 56.

The spelling of 415878122666 in words is "four hundred fifteen billion, eight hundred seventy-eight million, one hundred twenty-two thousand, six hundred sixty-six".