66965530 has 8 divisors (see below), whose sum is σ = 120537972. Its totient is φ = 26786208.

The previous prime is 66965527. The next prime is 66965551. The reversal of 66965530 is 3556966.

It can be written as a sum of positive squares in 2 ways, for example, as 66601921 + 363609 = 8161^2 + 603^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3348267 + ... + 3348286.

Almost surely, 2^66965530 is an apocalyptic number.

66965530 is a deficient number, since it is larger than the sum of its proper divisors (53572442).

66965530 is a wasteful number, since it uses less digits than its factorization.

66965530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6696560.

The product of its (nonzero) digits is 145800, while the sum is 40.

The square root of 66965530 is about 8183.2469106095. The cubic root of 66965530 is about 406.0851455773.

The spelling of 66965530 in words is "sixty-six million, nine hundred sixty-five thousand, five hundred thirty".