66880847 has 8 divisors (see below), whose sum is σ = 73885440. Its totient is φ = 60030360.

The previous prime is 66880843. The next prime is 66880889. The reversal of 66880847 is 74808866.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66880847 - 2² = 66880843 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 (66880841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37613 + ... + 39350.

It is an arithmetic number, because the mean of its divisors is an integer number (9235680).

Almost surely, 2^66880847 is an apocalyptic number.

66880847 is a deficient number, since it is larger than the sum of its proper divisors (7004593).

66880847 is a wasteful number, since it uses less digits than its factorization.

66880847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77053.

The product of its (nonzero) digits is 516096, while the sum is 47.

The square root of 66880847 is about 8178.0711050956. The cubic root of 66880847 is about 405.9138981998.

The spelling of 66880847 in words is "sixty-six million, eight hundred eighty thousand, eight hundred forty-seven".