413621666 has 4 divisors (see below), whose sum is σ = 620432502. Its totient is φ = 206810832.

The previous prime is 413621639. The next prime is 413621669. The reversal of 413621666 is 666126314.

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., 395174641 + 18447025 = 19879^2 + 4295^2 .

It is not an unprimeable number, because it can be changed into a prime (413621669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103405415 + ... + 103405418.

Almost surely, 2^413621666 is an apocalyptic number.

413621666 is a deficient number, since it is larger than the sum of its proper divisors (206810836).

413621666 is a wasteful number, since it uses less digits than its factorization.

413621666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206810835.

The product of its digits is 31104, while the sum is 35.

The square root of 413621666 is about 20337.6907735367. The cubic root of 413621666 is about 745.0768901017.

The spelling of 413621666 in words is "four hundred thirteen million, six hundred twenty-one thousand, six hundred sixty-six".