3650666 has 4 divisors (see below), whose sum is σ = 5476002. Its totient is φ = 1825332.

The previous prime is 3650663. The next prime is 3650677. The reversal of 3650666 is 6660563.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2608225 + 1042441 = 1615^2 + 1021^2 .

It is not an unprimeable number, because it can be changed into a prime (3650663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 912665 + ... + 912668.

Almost surely, 2^3650666 is an apocalyptic number.

3650666 is a deficient number, since it is larger than the sum of its proper divisors (1825336).

3650666 is a wasteful number, since it uses less digits than its factorization.

3650666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825335.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 3650666 is about 1910.6716096703. The cubic root of 3650666 is about 153.9775364997.

The spelling of 3650666 in words is "three million, six hundred fifty thousand, six hundred sixty-six".