66701001040 has 40 divisors (see below), whose sum is σ = 155697722208. Its totient is φ = 26574096000.

The previous prime is 66701001011. The next prime is 66701001047. The reversal of 66701001040 is 4010010766.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 66701000996 and 66701001014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66701001047) 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, 1640802 + ... + 1680961.

Almost surely, 2^66701001040 is an apocalyptic number.

It is an amenable number.

66701001040 is an abundant number, since it is smaller than the sum of its proper divisors (88996721168).

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

66701001040 is a wasteful number, since it uses less digits than its factorization.

66701001040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322027 (or 3322021 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The spelling of 66701001040 in words is "sixty-six billion, seven hundred one million, one thousand, forty".