20665007001 has 24 divisors (see below), whose sum is σ = 30780072960. Its totient is φ = 13351608000.

The previous prime is 20665006969. The next prime is 20665007003. The reversal of 20665007001 is 10070056602.

20665007001 is a `hidden beast` number, since 2 + 0 + 6 + 650 + 0 + 7 + 0 + 0 + 1 = 666.

It is not a de Polignac number, because 20665007001 - 2⁵ = 20665006969 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20665007003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129721 + ... + 241158.

It is an arithmetic number, because the mean of its divisors is an integer number (1282503040).

Almost surely, 2^20665007001 is an apocalyptic number.

It is an amenable number.

20665007001 is a deficient number, since it is larger than the sum of its proper divisors (10115065959).

20665007001 is a wasteful number, since it uses less digits than its factorization.

20665007001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371077 (or 371074 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The spelling of 20665007001 in words is "twenty billion, six hundred sixty-five million, seven thousand, one".