660121066 has 24 divisors (see below), whose sum is σ = 1145672640.
Its totient is φ = 284260680.
The previous prime is 660121043. The next prime is 660121073.
660121066 is nontrivially palindromic in base 10.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67186 + ... + 76381.
It is an arithmetic number, because the mean of its divisors is an integer number (47736360).
Almost surely, 2660121066 is an apocalyptic number.
660121066 is a deficient number, since it is larger than the sum of its proper divisors (485551574).
660121066 is a wasteful number, since it uses less digits than its factorization.
660121066 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 143610 (or 143599 counting only the distinct ones).
The product of its (nonzero) digits is 2592, while the sum is 28.
The square root of 660121066 is about 25692.8212931161.
The cubic root of 660121066 is about 870.7120018093.
The spelling of 660121066 in words is "six hundred sixty million, one hundred twenty-one thousand, sixty-six".