3666658 has 16 divisors (see below), whose sum is σ = 5915520. Its totient is φ = 1699056.

The previous prime is 3666647. The next prime is 3666659. The reversal of 3666658 is 8566663.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 3666658.

It is not an unprimeable number, because it can be changed into a prime (3666659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760 + ... + 2812.

It is an arithmetic number, because the mean of its divisors is an integer number (369720).

Almost surely, 2^3666658 is an apocalyptic number.

3666658 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3666658 is a deficient number, since it is larger than the sum of its proper divisors (2248862).

3666658 is a wasteful number, since it uses less digits than its factorization.

3666658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121.

The product of its digits is 155520, while the sum is 40.

The square root of 3666658 is about 1914.8519525018. The cubic root of 3666658 is about 154.2020454800.

The spelling of 3666658 in words is "three million, six hundred sixty-six thousand, six hundred fifty-eight".