406666737 has 10 divisors (see below), whose sum is σ = 607489938. Its totient is φ = 271111104.

The previous prime is 406666727. The next prime is 406666753. The reversal of 406666737 is 737666604.

It can be written as a sum of positive squares in only one way, i.e., 311487201 + 95179536 = 17649^2 + 9756^2 .

It is not a de Polignac number, because 406666737 - 2¹⁶ = 406601201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 406666692 and 406666701.

It is not an unprimeable number, because it can be changed into a prime (406666727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2510208 + ... + 2510369.

Almost surely, 2^406666737 is an apocalyptic number.

It is an amenable number.

406666737 is a deficient number, since it is larger than the sum of its proper divisors (200823201).

406666737 is an equidigital number, since it uses as much as digits as its factorization.

406666737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5020589 (or 5020580 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 45.

The square root of 406666737 is about 20165.9796935334. The cubic root of 406666737 is about 740.8771780893.

The spelling of 406666737 in words is "four hundred six million, six hundred sixty-six thousand, seven hundred thirty-seven".