66107545025 has 48 divisors (see below), whose sum is σ = 87156207360. Its totient is φ = 49600396800.

The previous prime is 66107545003. The next prime is 66107545037. The reversal of 66107545025 is 52054570166.

It is not a de Polignac number, because 66107545025 - 2¹⁸ = 66107282881 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28046147 + ... + 28048503.

It is an arithmetic number, because the mean of its divisors is an integer number (1815754320).

Almost surely, 2^66107545025 is an apocalyptic number.

It is an amenable number.

66107545025 is a deficient number, since it is larger than the sum of its proper divisors (21048662335).

66107545025 is a wasteful number, since it uses less digits than its factorization.

66107545025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954 (or 2949 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 66107545025 in words is "sixty-six billion, one hundred seven million, five hundred forty-five thousand, twenty-five".