66006193976 has 8 divisors (see below), whose sum is σ = 123761613720. Its totient is φ = 33003096984.

The previous prime is 66006193969. The next prime is 66006194003. The reversal of 66006193976 is 67939160066.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4125387116 + ... + 4125387131.

It is an arithmetic number, because the mean of its divisors is an integer number (15470201715).

Almost surely, 2^66006193976 is an apocalyptic number.

It is an amenable number.

66006193976 is a deficient number, since it is larger than the sum of its proper divisors (57755419744).

66006193976 is a wasteful number, since it uses less digits than its factorization.

66006193976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8250774253 (or 8250774249 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 53.

The spelling of 66006193976 in words is "sixty-six billion, six million, one hundred ninety-three thousand, nine hundred seventy-six".