66625305 has 32 divisors (see below), whose sum is σ = 113001600. Its totient is φ = 33426432.

The previous prime is 66625303. The next prime is 66625309. The reversal of 66625305 is 50352666.

It is not a de Polignac number, because 66625305 - 2¹ = 66625303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66625303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44001 + ... + 45489.

It is an arithmetic number, because the mean of its divisors is an integer number (3531300).

Almost surely, 2^66625305 is an apocalyptic number.

It is an amenable number.

66625305 is a deficient number, since it is larger than the sum of its proper divisors (46376295).

66625305 is a wasteful number, since it uses less digits than its factorization.

66625305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 66625305 is about 8162.4325418346. The cubic root of 66625305 is about 405.3962590195.

The spelling of 66625305 in words is "sixty-six million, six hundred twenty-five thousand, three hundred five".