121666262667 has 8 divisors (see below), whose sum is σ = 165994281024. Its totient is φ = 79224543048.

The previous prime is 121666262659. The next prime is 121666262699. The reversal of 121666262667 is 766262666121.

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

It is not a de Polignac number, because 121666262667 - 2³ = 121666262659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121666262647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471574533 + ... + 471574790.

It is an arithmetic number, because the mean of its divisors is an integer number (20749285128).

Almost surely, 2^121666262667 is an apocalyptic number.

121666262667 is a deficient number, since it is larger than the sum of its proper divisors (44328018357).

121666262667 is an equidigital number, since it uses as much as digits as its factorization.

121666262667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943149369.

The product of its digits is 2612736, while the sum is 51.

The spelling of 121666262667 in words is "one hundred twenty-one billion, six hundred sixty-six million, two hundred sixty-two thousand, six hundred sixty-seven".