66472687 has 2 divisors, whose sum is σ = 66472688. Its totient is φ = 66472686.

The previous prime is 66472673. The next prime is 66472723. The reversal of 66472687 is 78627466.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66472687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66472607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33236343 + 33236344.

It is an arithmetic number, because the mean of its divisors is an integer number (33236344).

Almost surely, 2^66472687 is an apocalyptic number.

66472687 is a deficient number, since it is larger than the sum of its proper divisors (1).

66472687 is an equidigital number, since it uses as much as digits as its factorization.

66472687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 46.

The square root of 66472687 is about 8153.0783756812. The cubic root of 66472687 is about 405.0864764789.

The spelling of 66472687 in words is "sixty-six million, four hundred seventy-two thousand, six hundred eighty-seven".