121666672 has 20 divisors (see below), whose sum is σ = 237895240. Its totient is φ = 60274368.

The previous prime is 121666669. The next prime is 121666697. The reversal of 121666672 is 276666121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33138 + ... + 36625.

It is an arithmetic number, because the mean of its divisors is an integer number (11894762).

Almost surely, 2^121666672 is an apocalyptic number.

It is an amenable number.

121666672 is a deficient number, since it is larger than the sum of its proper divisors (116228568).

121666672 is a wasteful number, since it uses less digits than its factorization.

121666672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69880 (or 69874 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 121666672 is about 11030.2616469420. The cubic root of 121666672 is about 495.5154607338.

The spelling of 121666672 in words is "one hundred twenty-one million, six hundred sixty-six thousand, six hundred seventy-two".