3665970 has 144 divisors (see below), whose sum is σ = 12422592. Its totient is φ = 728640.

The previous prime is 3665941. The next prime is 3665989. The reversal of 3665970 is 795663.

It is a happy number.

3665970 is a `hidden beast` number, since 3 + 66 + 597 + 0 = 666.

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, 159379 + ... + 159401.

It is an arithmetic number, because the mean of its divisors is an integer number (86268).

Almost surely, 2^3665970 is an apocalyptic number.

3665970 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3665970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6211296).

3665970 is an abundant number, since it is smaller than the sum of its proper divisors (8756622).

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

3665970 is a wasteful number, since it uses less digits than its factorization.

3665970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 3665970 is about 1914.6722957206. The cubic root of 3665970 is about 154.1924002169.

It can be divided in two parts, 366 and 5970, that added together give a palindrome (6336).

The spelling of 3665970 in words is "three million, six hundred sixty-five thousand, nine hundred seventy".