66370487 has 4 divisors (see below), whose sum is σ = 66663096. Its totient is φ = 66077880.

The previous prime is 66370471. The next prime is 66370511. The reversal of 66370487 is 78407366.

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

It is a cyclic number.

It is not a de Polignac number, because 66370487 - 2⁴ = 66370471 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 (66370687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145964 + ... + 146417.

It is an arithmetic number, because the mean of its divisors is an integer number (16665774).

Almost surely, 2^66370487 is an apocalyptic number.

66370487 is a deficient number, since it is larger than the sum of its proper divisors (292609).

66370487 is a wasteful number, since it uses less digits than its factorization.

66370487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292608.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 66370487 is about 8146.8083934753. The cubic root of 66370487 is about 404.8787667415.

The spelling of 66370487 in words is "sixty-six million, three hundred seventy thousand, four hundred eighty-seven".