66830487 has 4 divisors (see below), whose sum is σ = 89107320. Its totient is φ = 44553656.

The previous prime is 66830461. The next prime is 66830503. The reversal of 66830487 is 78403866.

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 66830487 - 2²³ = 58441879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66830437) 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, 11138412 + ... + 11138417.

It is an arithmetic number, because the mean of its divisors is an integer number (22276830).

Almost surely, 2^66830487 is an apocalyptic number.

66830487 is a deficient number, since it is larger than the sum of its proper divisors (22276833).

66830487 is a wasteful number, since it uses less digits than its factorization.

66830487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22276832.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 66830487 is about 8174.9915596287. The cubic root of 66830487 is about 405.8119908140.

The spelling of 66830487 in words is "sixty-six million, eight hundred thirty thousand, four hundred eighty-seven".