66965954850 has 96 divisors (see below), whose sum is σ = 188454723840. Its totient is φ = 17477622720.

The previous prime is 66965954849. The next prime is 66965954921. The reversal of 66965954850 is 5845956966.

66965954850 is a `hidden beast` number, since 6 + 6 + 9 + 65 + 95 + 485 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 464257 + ... + 591156.

It is an arithmetic number, because the mean of its divisors is an integer number (1963070040).

Almost surely, 2^66965954850 is an apocalyptic number.

66965954850 is an abundant number, since it is smaller than the sum of its proper divisors (121488768990).

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

66965954850 is a wasteful number, since it uses less digits than its factorization.

66965954850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055481 (or 1055470 counting only the distinct ones).

The product of its (nonzero) digits is 69984000, while the sum is 63.

The spelling of 66965954850 in words is "sixty-six billion, nine hundred sixty-five million, nine hundred fifty-four thousand, eight hundred fifty".