66730697 has 8 divisors (see below), whose sum is σ = 72875712. Its totient is φ = 60598800.

The previous prime is 66730691. The next prime is 66730709. The reversal of 66730697 is 79603766.

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 66730697 - 2⁶ = 66730633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66730691) 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, 9572 + ... + 15002.

It is an arithmetic number, because the mean of its divisors is an integer number (9109464).

Almost surely, 2^66730697 is an apocalyptic number.

It is an amenable number.

66730697 is a deficient number, since it is larger than the sum of its proper divisors (6145015).

66730697 is a wasteful number, since it uses less digits than its factorization.

66730697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6559.

The product of its (nonzero) digits is 285768, while the sum is 44.

The square root of 66730697 is about 8168.8859093514. The cubic root of 66730697 is about 405.6099066402.

The spelling of 66730697 in words is "sixty-six million, seven hundred thirty thousand, six hundred ninety-seven".