65166620 has 48 divisors (see below), whose sum is σ = 142375968. Its totient is φ = 25032960.

The previous prime is 65166611. The next prime is 65166623. The reversal of 65166620 is 2666156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65166623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60890 + ... + 61950.

It is an arithmetic number, because the mean of its divisors is an integer number (2966166).

Almost surely, 2^65166620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65166620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71187984).

65166620 is an abundant number, since it is smaller than the sum of its proper divisors (77209348).

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

65166620 is a wasteful number, since it uses less digits than its factorization.

65166620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190 (or 1188 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 65166620 is about 8072.5844684339. The cubic root of 65166620 is about 402.4158382730.

The spelling of 65166620 in words is "sixty-five million, one hundred sixty-six thousand, six hundred twenty".