66667340732 has 6 divisors (see below), whose sum is σ = 116667846288. Its totient is φ = 33333670364.

The previous prime is 66667340717. The next prime is 66667340767. The reversal of 66667340732 is 23704376666.

It is a happy number.

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, 8333417588 + ... + 8333417595.

It is an arithmetic number, because the mean of its divisors is an integer number (19444641048).

Almost surely, 2^66667340732 is an apocalyptic number.

It is an amenable number.

66667340732 is a deficient number, since it is larger than the sum of its proper divisors (50000505556).

66667340732 is a wasteful number, since it uses less digits than its factorization.

66667340732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16666835187 (or 16666835185 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 50.

The spelling of 66667340732 in words is "sixty-six billion, six hundred sixty-seven million, three hundred forty thousand, seven hundred thirty-two".