121666677 has 16 divisors (see below), whose sum is σ = 177374208. Its totient is φ = 73568880.

The previous prime is 121666669. The next prime is 121666697. The reversal of 121666677 is 776666121.

It is not a de Polignac number, because 121666677 - 2³ = 121666669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121666697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11298 + ... + 19260.

It is an arithmetic number, because the mean of its divisors is an integer number (11085888).

Almost surely, 2^121666677 is an apocalyptic number.

It is an amenable number.

121666677 is a deficient number, since it is larger than the sum of its proper divisors (55707531).

121666677 is a wasteful number, since it uses less digits than its factorization.

121666677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8440.

The product of its digits is 127008, while the sum is 42.

The square root of 121666677 is about 11030.2618735912. The cubic root of 121666677 is about 495.5154675217.

The spelling of 121666677 in words is "one hundred twenty-one million, six hundred sixty-six thousand, six hundred seventy-seven".