20660007 has 8 divisors (see below), whose sum is σ = 27650160. Its totient is φ = 13721600.

The previous prime is 20659999. The next prime is 20660047. The reversal of 20660007 is 70006602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20660007 - 2³ = 20659999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660047) 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, 11994 + ... + 13607.

It is an arithmetic number, because the mean of its divisors is an integer number (3456270).

Almost surely, 2^20660007 is an apocalyptic number.

20660007 is a deficient number, since it is larger than the sum of its proper divisors (6990153).

20660007 is a wasteful number, since it uses less digits than its factorization.

20660007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25873.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 20660007 is about 4545.3280409669. The cubic root of 20660007 is about 274.3953967883.

Adding to 20660007 its reverse (70006602), we get a palindrome (90666609).

The spelling of 20660007 in words is "twenty million, six hundred sixty thousand, seven".