66525807074 has 8 divisors (see below), whose sum is σ = 99791099868. Its totient is φ = 33262107120.

The previous prime is 66525807037. The next prime is 66525807097. The reversal of 66525807074 is 47070852566.

It can be written as a sum of positive squares in 2 ways, for example, as 50613750625 + 15912056449 = 224975^2 + 126143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287657 + ... + 464540.

Almost surely, 2^66525807074 is an apocalyptic number.

66525807074 is a deficient number, since it is larger than the sum of its proper divisors (33265292794).

66525807074 is a wasteful number, since it uses less digits than its factorization.

66525807074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796420.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 66525807074 in words is "sixty-six billion, five hundred twenty-five million, eight hundred seven thousand, seventy-four".