66590677 has 4 divisors (see below), whose sum is σ = 66884256. Its totient is φ = 66297100.

The previous prime is 66590663. The next prime is 66590729. The reversal of 66590677 is 77609566.

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-66590677 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 (66590477) 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, 146449 + ... + 146902.

It is an arithmetic number, because the mean of its divisors is an integer number (16721064).

Almost surely, 2^66590677 is an apocalyptic number.

It is an amenable number.

66590677 is a deficient number, since it is larger than the sum of its proper divisors (293579).

66590677 is a wasteful number, since it uses less digits than its factorization.

66590677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293578.

The product of its (nonzero) digits is 476280, while the sum is 46.

The square root of 66590677 is about 8160.3110847565. The cubic root of 66590677 is about 405.3260129650.

The spelling of 66590677 in words is "sixty-six million, five hundred ninety thousand, six hundred seventy-seven".