66676659 has 8 divisors (see below), whose sum is σ = 101602560. Its totient is φ = 38100936.

The previous prime is 66676657. The next prime is 66676697. The reversal of 66676659 is 95667666.

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

It is not a de Polignac number, because 66676659 - 2¹ = 66676657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66676657) 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, 1587519 + ... + 1587560.

It is an arithmetic number, because the mean of its divisors is an integer number (12700320).

Almost surely, 2^66676659 is an apocalyptic number.

66676659 is a deficient number, since it is larger than the sum of its proper divisors (34925901).

66676659 is a wasteful number, since it uses less digits than its factorization.

66676659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175089.

The product of its digits is 2449440, while the sum is 51.

The square root of 66676659 is about 8165.5776893004. The cubic root of 66676659 is about 405.5003904894.

The spelling of 66676659 in words is "sixty-six million, six hundred seventy-six thousand, six hundred fifty-nine".