66201625 has 16 divisors (see below), whose sum is σ = 94423680. Its totient is φ = 45394800.

The previous prime is 66201623. The next prime is 66201631. The reversal of 66201625 is 52610266.

It is not a de Polignac number, because 66201625 - 2¹ = 66201623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66201593 and 66201602.

It is not an unprimeable number, because it can be changed into a prime (66201623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36955 + ... + 38704.

It is an arithmetic number, because the mean of its divisors is an integer number (5901480).

Almost surely, 2^66201625 is an apocalyptic number.

It is an amenable number.

66201625 is a deficient number, since it is larger than the sum of its proper divisors (28222055).

66201625 is an equidigital number, since it uses as much as digits as its factorization.

66201625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75681 (or 75671 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 66201625 is about 8136.4381027573. The cubic root of 66201625 is about 404.5351064520.

The spelling of 66201625 in words is "sixty-six million, two hundred one thousand, six hundred twenty-five".