406661406025 has 12 divisors (see below), whose sum is σ = 576297307072. Its totient is φ = 278853535440.

The previous prime is 406661405989. The next prime is 406661406061. The reversal of 406661406025 is 520604166604.

It is an interprime number because it is at equal distance from previous prime (406661405989) and next prime (406661406061).

It is not a de Polignac number, because 406661406025 - 2³¹ = 404513922377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1161889557 + ... + 1161889906.

Almost surely, 2^406661406025 is an apocalyptic number.

It is an amenable number.

406661406025 is a deficient number, since it is larger than the sum of its proper divisors (169635901047).

406661406025 is a wasteful number, since it uses less digits than its factorization.

406661406025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323779480 (or 2323779475 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 406661406025 in words is "four hundred six billion, six hundred sixty-one million, four hundred six thousand, twenty-five".