406662669 has 36 divisors (see below), whose sum is σ = 678845856. Its totient is φ = 229792464.

The previous prime is 406662647. The next prime is 406662713. The reversal of 406662669 is 966266604.

It is not a de Polignac number, because 406662669 - 2¹² = 406658573 is a prime.

It is a super-2 number, since 2×406662669² = 330749052716407122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406662469) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2043432 + ... + 2043630.

Almost surely, 2^406662669 is an apocalyptic number.

It is an amenable number.

406662669 is a deficient number, since it is larger than the sum of its proper divisors (272183187).

406662669 is a wasteful number, since it uses less digits than its factorization.

406662669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The square root of 406662669 is about 20165.8788303411. The cubic root of 406662669 is about 740.8747076812.

The spelling of 406662669 in words is "four hundred six million, six hundred sixty-two thousand, six hundred sixty-nine".