66730715 has 8 divisors (see below), whose sum is σ = 80492928. Its totient is φ = 53107200.

The previous prime is 66730709. The next prime is 66730757. The reversal of 66730715 is 51703766.

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

It is not a de Polignac number, because 66730715 - 2¹⁴ = 66714331 is a prime.

It is a super-2 number, since 2×66730715² = 8905976648822450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33611 + ... + 35540.

It is an arithmetic number, because the mean of its divisors is an integer number (10061616).

Almost surely, 2^66730715 is an apocalyptic number.

66730715 is a deficient number, since it is larger than the sum of its proper divisors (13762213).

66730715 is a wasteful number, since it uses less digits than its factorization.

66730715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69349.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 66730715 is about 8168.8870110928. The cubic root of 66730715 is about 405.6099431101.

The spelling of 66730715 in words is "sixty-six million, seven hundred thirty thousand, seven hundred fifteen".