406660566 has 16 divisors (see below), whose sum is σ = 875884464. Its totient is φ = 125126304.

The previous prime is 406660561. The next prime is 406660567. The reversal of 406660566 is 665066604.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406660561) 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, 2606721 + ... + 2606876.

It is an arithmetic number, because the mean of its divisors is an integer number (54742779).

Almost surely, 2^406660566 is an apocalyptic number.

406660566 is an abundant number, since it is smaller than the sum of its proper divisors (469223898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

406660566 is a wasteful number, since it uses less digits than its factorization.

406660566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5213615.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 406660566 is about 20165.8266877408. The cubic root of 406660566 is about 740.8734305685.

The spelling of 406660566 in words is "four hundred six million, six hundred sixty thousand, five hundred sixty-six".