406661357 has 4 divisors (see below), whose sum is σ = 407723520. Its totient is φ = 405599196.

The previous prime is 406661341. The next prime is 406661377. The reversal of 406661357 is 753166604.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 406661357 - 2⁴ = 406661341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406661357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406661377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530507 + ... + 531272.

It is an arithmetic number, because the mean of its divisors is an integer number (101930880).

Almost surely, 2^406661357 is an apocalyptic number.

It is an amenable number.

406661357 is a deficient number, since it is larger than the sum of its proper divisors (1062163).

406661357 is a wasteful number, since it uses less digits than its factorization.

406661357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062162.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 406661357 is about 20165.8463001184. The cubic root of 406661357 is about 740.8739109286.

The spelling of 406661357 in words is "four hundred six million, six hundred sixty-one thousand, three hundred fifty-seven".