66212336025 has 72 divisors (see below), whose sum is σ = 132530580000. Its totient is φ = 31319904000.

The previous prime is 66212335957. The next prime is 66212336041. The reversal of 66212336025 is 52063321266.

66212336025 is a `hidden beast` number, since 6 + 6 + 2 + 12 + 33 + 602 + 5 = 666.

It is not a de Polignac number, because 66212336025 - 2¹⁰ = 66212335001 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 224775 + ... + 427724.

It is an arithmetic number, because the mean of its divisors is an integer number (1840702500).

Almost surely, 2^66212336025 is an apocalyptic number.

It is an amenable number.

66212336025 is an abundant number, since it is smaller than the sum of its proper divisors (66318243975).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66212336025 is a wasteful number, since it uses less digits than its factorization.

66212336025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652567 (or 652559 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 66212336025 in words is "sixty-six billion, two hundred twelve million, three hundred thirty-six thousand, twenty-five".