65630405 has 8 divisors (see below), whose sum is σ = 78840600. Its totient is φ = 52448256.

The previous prime is 65630401. The next prime is 65630429. The reversal of 65630405 is 50403656.

It can be written as a sum of positive squares in 4 ways, for example, as 247009 + 65383396 = 497^2 + 8086^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 65630405 - 2² = 65630401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65630401) 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, 1460 + ... + 11549.

It is an arithmetic number, because the mean of its divisors is an integer number (9855075).

Almost surely, 2^65630405 is an apocalyptic number.

It is an amenable number.

65630405 is a deficient number, since it is larger than the sum of its proper divisors (13210195).

65630405 is a wasteful number, since it uses less digits than its factorization.

65630405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14023.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 65630405 is about 8101.2594699837. The cubic root of 65630405 is about 403.3682349568.

The spelling of 65630405 in words is "sixty-five million, six hundred thirty thousand, four hundred five".