66287677 has 4 divisors (see below), whose sum is σ = 66907296. Its totient is φ = 65668060.

The previous prime is 66287671. The next prime is 66287687. The reversal of 66287677 is 77678266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66287677 is a prime.

It is a super-2 number, since 2×66287677² = 8788112244112658, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66287677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66287671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309649 + ... + 309862.

It is an arithmetic number, because the mean of its divisors is an integer number (16726824).

Almost surely, 2^66287677 is an apocalyptic number.

It is an amenable number.

66287677 is a deficient number, since it is larger than the sum of its proper divisors (619619).

66287677 is a wasteful number, since it uses less digits than its factorization.

66287677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619618.

The product of its digits is 1185408, while the sum is 49.

The square root of 66287677 is about 8141.7244487885. The cubic root of 66287677 is about 404.7103085101.

The spelling of 66287677 in words is "sixty-six million, two hundred eighty-seven thousand, six hundred seventy-seven".