66025508722 has 4 divisors (see below), whose sum is σ = 99038263086. Its totient is φ = 33012754360.

The previous prime is 66025508699. The next prime is 66025508737. The reversal of 66025508722 is 22780552066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 63579118201 + 2446390521 = 252149^2 + 49461^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16506377179 + ... + 16506377182.

Almost surely, 2^66025508722 is an apocalyptic number.

66025508722 is a deficient number, since it is larger than the sum of its proper divisors (33012754364).

66025508722 is a wasteful number, since it uses less digits than its factorization.

66025508722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33012754363.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 66025508722 in words is "sixty-six billion, twenty-five million, five hundred eight thousand, seven hundred twenty-two".