3966660 has 36 divisors (see below), whose sum is σ = 12032748. Its totient is φ = 1057728.

The previous prime is 3966631. The next prime is 3966689. The reversal of 3966660 is 666693.

It is an interprime number because it is at equal distance from previous prime (3966631) and next prime (3966689).

It can be written as a sum of positive squares in 2 ways, for example, as 876096 + 3090564 = 936^2 + 1758^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10839 + ... + 11198.

It is an arithmetic number, because the mean of its divisors is an integer number (334243).

Almost surely, 2^3966660 is an apocalyptic number.

3966660 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3966660 is an abundant number, since it is smaller than the sum of its proper divisors (8066088).

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

3966660 is a wasteful number, since it uses less digits than its factorization.

3966660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22052 (or 22047 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 3966660 is about 1991.6475591831. The cubic root of 3966660 is about 158.2978412290.

It can be divided in two parts, 396 and 6660, that added together give a square (7056 = 84²).

The spelling of 3966660 in words is "three million, nine hundred sixty-six thousand, six hundred sixty".