66632472007 has 4 divisors (see below), whose sum is σ = 66643999920. Its totient is φ = 66620944096.

The previous prime is 66632471987. The next prime is 66632472019. The reversal of 66632472007 is 70027423666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66632472007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66632476007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5755282 + ... + 5766847.

It is an arithmetic number, because the mean of its divisors is an integer number (16660999980).

Almost surely, 2^66632472007 is an apocalyptic number.

66632472007 is a deficient number, since it is larger than the sum of its proper divisors (11527913).

66632472007 is a wasteful number, since it uses less digits than its factorization.

66632472007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11527912.

The product of its (nonzero) digits is 508032, while the sum is 43.

The spelling of 66632472007 in words is "sixty-six billion, six hundred thirty-two million, four hundred seventy-two thousand, seven".