3425405666 has 4 divisors (see below), whose sum is σ = 5138108502. Its totient is φ = 1712702832.

The previous prime is 3425405629. The next prime is 3425405677. The reversal of 3425405666 is 6665045243.

It is a happy number.

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., 2662044025 + 763361641 = 51595^2 + 27629^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 856351415 + ... + 856351418.

Almost surely, 2^3425405666 is an apocalyptic number.

3425405666 is a deficient number, since it is larger than the sum of its proper divisors (1712702836).

3425405666 is a wasteful number, since it uses less digits than its factorization.

3425405666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712702835.

The product of its (nonzero) digits is 518400, while the sum is 41.

The square root of 3425405666 is about 58526.9652895142. The cubic root of 3425405666 is about 1507.4306357273.

The spelling of 3425405666 in words is "three billion, four hundred twenty-five million, four hundred five thousand, six hundred sixty-six".