66025605 has 16 divisors (see below), whose sum is σ = 109284480. Its totient is φ = 33999168.

The previous prime is 66025591. The next prime is 66025657. The reversal of 66025605 is 50652066.

It is not a de Polignac number, because 66025605 - 2¹² = 66021509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75457 + ... + 76326.

It is an arithmetic number, because the mean of its divisors is an integer number (6830280).

Almost surely, 2^66025605 is an apocalyptic number.

It is an amenable number.

66025605 is a deficient number, since it is larger than the sum of its proper divisors (43258875).

66025605 is a wasteful number, since it uses less digits than its factorization.

66025605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151820.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 66025605 is about 8125.6141306365. The cubic root of 66025605 is about 404.1762558866.

The spelling of 66025605 in words is "sixty-six million, twenty-five thousand, six hundred five".