66854025 has 48 divisors (see below), whose sum is σ = 140368000. Its totient is φ = 30559680.

The previous prime is 66854023. The next prime is 66854071. The reversal of 66854025 is 52045866.

It is not a de Polignac number, because 66854025 - 2¹ = 66854023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66854023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2350 + ... + 11799.

Almost surely, 2^66854025 is an apocalyptic number.

It is an amenable number.

66854025 is an abundant number, since it is smaller than the sum of its proper divisors (73513975).

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

66854025 is a wasteful number, since it uses less digits than its factorization.

66854025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14175 (or 14164 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 66854025 is about 8176.4310674034. The cubic root of 66854025 is about 405.8596281617.

The spelling of 66854025 in words is "sixty-six million, eight hundred fifty-four thousand, twenty-five".