66625063 has 4 divisors (see below), whose sum is σ = 67104520. Its totient is φ = 66145608.

The previous prime is 66625037. The next prime is 66625067. The reversal of 66625063 is 36052666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66625063 - 2¹³ = 66616871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66625067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239520 + ... + 239797.

It is an arithmetic number, because the mean of its divisors is an integer number (16776130).

Almost surely, 2^66625063 is an apocalyptic number.

66625063 is a deficient number, since it is larger than the sum of its proper divisors (479457).

66625063 is a wasteful number, since it uses less digits than its factorization.

66625063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479456.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 66625063 is about 8162.4177178089. The cubic root of 66625063 is about 405.3957681849.

The spelling of 66625063 in words is "sixty-six million, six hundred twenty-five thousand, sixty-three".