121766478 has 64 divisors (see below), whose sum is σ = 275063040. Its totient is φ = 35707392.

The previous prime is 121766471. The next prime is 121766503. The reversal of 121766478 is 874667121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121766471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160476 + ... + 161232.

It is an arithmetic number, because the mean of its divisors is an integer number (4297860).

Almost surely, 2^121766478 is an apocalyptic number.

121766478 is an abundant number, since it is smaller than the sum of its proper divisors (153296562).

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

121766478 is a wasteful number, since it uses less digits than its factorization.

121766478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881.

The product of its digits is 112896, while the sum is 42.

The square root of 121766478 is about 11034.7849095485. The cubic root of 121766478 is about 495.6509179856.

The spelling of 121766478 in words is "one hundred twenty-one million, seven hundred sixty-six thousand, four hundred seventy-eight".