3898666 has 4 divisors (see below), whose sum is σ = 5848002. Its totient is φ = 1949332.

The previous prime is 3898651. The next prime is 3898717. The reversal of 3898666 is 6668983.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6668983 = 821 ⋅8123.

It can be written as a sum of positive squares in only one way, i.e., 3367225 + 531441 = 1835^2 + 729^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974665 + ... + 974668.

Almost surely, 2^3898666 is an apocalyptic number.

3898666 is a deficient number, since it is larger than the sum of its proper divisors (1949336).

3898666 is a wasteful number, since it uses less digits than its factorization.

3898666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949335.

The product of its digits is 373248, while the sum is 46.

The square root of 3898666 is about 1974.5039883475. The cubic root of 3898666 is about 157.3881426313.

The spelling of 3898666 in words is "three million, eight hundred ninety-eight thousand, six hundred sixty-six".