66513596412950 has 12 divisors (see below), whose sum is σ = 123715289328180. Its totient is φ = 26605438565160.

The previous prime is 66513596412877. The next prime is 66513596412953. The reversal of 66513596412950 is 5921469531566.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66513596412953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 665135964080 + ... + 665135964179.

It is an arithmetic number, because the mean of its divisors is an integer number (10309607444015).

Almost surely, 2^{66513596412950} is an apocalyptic number.

66513596412950 is a deficient number, since it is larger than the sum of its proper divisors (57201692915230).

66513596412950 is a wasteful number, since it uses less digits than its factorization.

66513596412950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330271928271 (or 1330271928266 counting only the distinct ones).

The product of its (nonzero) digits is 52488000, while the sum is 62.

The spelling of 66513596412950 in words is "sixty-six trillion, five hundred thirteen billion, five hundred ninety-six million, four hundred twelve thousand, nine hundred fifty".