66603976212 has 24 divisors (see below), whose sum is σ = 157598142912. Its totient is φ = 21888630400.

The previous prime is 66603976183. The next prime is 66603976217. The reversal of 66603976212 is 21267930666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66603976217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39085989 + ... + 39087692.

It is an arithmetic number, because the mean of its divisors is an integer number (6566589288).

Almost surely, 2^66603976212 is an apocalyptic number.

It is an amenable number.

66603976212 is an abundant number, since it is smaller than the sum of its proper divisors (90994166700).

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

66603976212 is a wasteful number, since it uses less digits than its factorization.

66603976212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78173759 (or 78173757 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 48.

The spelling of 66603976212 in words is "sixty-six billion, six hundred three million, nine hundred seventy-six thousand, two hundred twelve".