66641286 has 8 divisors (see below), whose sum is σ = 133282584. Its totient is φ = 22213760.

The previous prime is 66641279. The next prime is 66641287. The reversal of 66641286 is 68214666.

It is a sphenic number, since it is the product of 3 distinct primes.

66641286 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66641287) 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, 5553435 + ... + 5553446.

It is an arithmetic number, because the mean of its divisors is an integer number (16660323).

Almost surely, 2^66641286 is an apocalyptic number.

66641286 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66641286 is a wasteful number, since it uses less digits than its factorization.

66641286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11106886.

The product of its digits is 82944, while the sum is 39.

The square root of 66641286 is about 8163.4114192536. The cubic root of 66641286 is about 405.4286697263.

The spelling of 66641286 in words is "sixty-six million, six hundred forty-one thousand, two hundred eighty-six".