66730616 has 32 divisors (see below), whose sum is σ = 128746800. Its totient is φ = 32405760.

The previous prime is 66730607. The next prime is 66730621. The reversal of 66730616 is 61603766.

It is a happy number.

It is a super-2 number, since 2×66730616² = 8905950223478912, which contains 22 as substring.

It is a congruent 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, 127331 + ... + 127853.

Almost surely, 2^66730616 is an apocalyptic number.

It is an amenable number.

66730616 is a deficient number, since it is larger than the sum of its proper divisors (62016184).

66730616 is a wasteful number, since it uses less digits than its factorization.

66730616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959 (or 955 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 66730616 is about 8168.8809515135. The cubic root of 66730616 is about 405.6097425258.

The spelling of 66730616 in words is "sixty-six million, seven hundred thirty thousand, six hundred sixteen".