406666371 has 8 divisors (see below), whose sum is σ = 556876624. Its totient is φ = 263783520.

The previous prime is 406666361. The next prime is 406666373. The reversal of 406666371 is 173666604.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 406666371 - 2⁹ = 406665859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406666373) 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, 1831720 + ... + 1831941.

It is an arithmetic number, because the mean of its divisors is an integer number (69609578).

Almost surely, 2^406666371 is an apocalyptic number.

406666371 is a deficient number, since it is larger than the sum of its proper divisors (150210253).

406666371 is a wasteful number, since it uses less digits than its factorization.

406666371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663701.

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 406666371 is about 20165.9706188420. The cubic root of 406666371 is about 740.8769558261.

The spelling of 406666371 in words is "four hundred six million, six hundred sixty-six thousand, three hundred seventy-one".