66277487 has 4 divisors (see below), whose sum is σ = 66341016. Its totient is φ = 66213960.

The previous prime is 66277483. The next prime is 66277489. The reversal of 66277487 is 78477266.

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 66277487 - 2² = 66277483 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 (66277483) 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, 30173 + ... + 32294.

It is an arithmetic number, because the mean of its divisors is an integer number (16585254).

Almost surely, 2^66277487 is an apocalyptic number.

66277487 is a deficient number, since it is larger than the sum of its proper divisors (63529).

66277487 is a wasteful number, since it uses less digits than its factorization.

66277487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63528.

The product of its digits is 790272, while the sum is 47.

The square root of 66277487 is about 8141.0986359336. The cubic root of 66277487 is about 404.6895695655.

The spelling of 66277487 in words is "sixty-six million, two hundred seventy-seven thousand, four hundred eighty-seven".