66965954904 has 80 divisors (see below), whose sum is σ = 190136220120. Its totient is φ = 22016188800.

The previous prime is 66965954849. The next prime is 66965954921. The reversal of 66965954904 is 40945956966.

66965954904 is a `hidden beast` number, since 6 + 6 + 96 + 59 + 5 + 490 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 660522 + ... + 755129.

Almost surely, 2^66965954904 is an apocalyptic number.

It is an amenable number.

66965954904 is an abundant number, since it is smaller than the sum of its proper divisors (123170265216).

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

66965954904 is a wasteful number, since it uses less digits than its factorization.

66965954904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415742 (or 1415729 counting only the distinct ones).

The product of its (nonzero) digits is 62985600, while the sum is 63.

The spelling of 66965954904 in words is "sixty-six billion, nine hundred sixty-five million, nine hundred fifty-four thousand, nine hundred four".