1667421924472 has 16 divisors (see below), whose sum is σ = 3310322938560. Its totient is φ = 784669140864.

The previous prime is 1667421924463. The next prime is 1667421924473. The reversal of 1667421924472 is 2744291247661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667421924473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6130227528 + ... + 6130227799.

It is an arithmetic number, because the mean of its divisors is an integer number (206895183660).

Almost surely, 2^{1667421924472} is an apocalyptic number.

It is an amenable number.

1667421924472 is a deficient number, since it is larger than the sum of its proper divisors (1642901014088).

1667421924472 is a wasteful number, since it uses less digits than its factorization.

1667421924472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12260455350 (or 12260455346 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 55.

The spelling of 1667421924472 in words is "one trillion, six hundred sixty-seven billion, four hundred twenty-one million, nine hundred twenty-four thousand, four hundred seventy-two".