1667226417720 has 64 divisors (see below), whose sum is σ = 5006961198720. Its totient is φ = 444124205184.

The previous prime is 1667226417719. The next prime is 1667226417733. The reversal of 1667226417720 is 277146227661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7221922 + ... + 7449201.

It is an arithmetic number, because the mean of its divisors is an integer number (78233768730).

Almost surely, 2^{1667226417720} is an apocalyptic number.

1667226417720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1667226417720 is an abundant number, since it is smaller than the sum of its proper divisors (3339734781000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1667226417720 is a wasteful number, since it uses less digits than its factorization.

1667226417720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14672084 (or 14672080 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 51.

The spelling of 1667226417720 in words is "one trillion, six hundred sixty-seven billion, two hundred twenty-six million, four hundred seventeen thousand, seven hundred twenty".