65660166 has 96 divisors (see below), whose sum is σ = 172942560. Its totient is φ = 18342720.

The previous prime is 65660123. The next prime is 65660167. The reversal of 65660166 is 66106656.

It is a super-2 number, since 2×65660166² = 8622514798295112, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 65660166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65660167) 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, 84556 + ... + 85328.

It is an arithmetic number, because the mean of its divisors is an integer number (1801485).

Almost surely, 2^65660166 is an apocalyptic number.

65660166 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 65660166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86471280).

65660166 is an abundant number, since it is smaller than the sum of its proper divisors (107282394).

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

65660166 is a wasteful number, since it uses less digits than its factorization.

65660166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819 (or 802 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 65660166 is about 8103.0960749580. The cubic root of 65660166 is about 403.4291966810.

The spelling of 65660166 in words is "sixty-five million, six hundred sixty thousand, one hundred sixty-six".