66672659 has 8 divisors (see below), whose sum is σ = 68125680. Its totient is φ = 65235456.

The previous prime is 66672559. The next prime is 66672677. The reversal of 66672659 is 95627666.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66672659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66672679) 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, 4772 + ... + 12494.

It is an arithmetic number, because the mean of its divisors is an integer number (8515710).

Almost surely, 2^66672659 is an apocalyptic number.

66672659 is a deficient number, since it is larger than the sum of its proper divisors (1453021).

66672659 is an equidigital number, since it uses as much as digits as its factorization.

66672659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7909.

The product of its digits is 816480, while the sum is 47.

The square root of 66672659 is about 8165.3327550076. The cubic root of 66672659 is about 405.4922815348.

The spelling of 66672659 in words is "sixty-six million, six hundred seventy-two thousand, six hundred fifty-nine".