65641403 has 4 divisors (see below), whose sum is σ = 69502680. Its totient is φ = 61780128.

The previous prime is 65641399. The next prime is 65641427. The reversal of 65641403 is 30414656.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65641403 - 2² = 65641399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65641003) 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, 1930613 + ... + 1930646.

It is an arithmetic number, because the mean of its divisors is an integer number (17375670).

Almost surely, 2^65641403 is an apocalyptic number.

65641403 is a deficient number, since it is larger than the sum of its proper divisors (3861277).

65641403 is a wasteful number, since it uses less digits than its factorization.

65641403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3861276.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 65641403 is about 8101.9382248941. The cubic root of 65641403 is about 403.3907651447.

The spelling of 65641403 in words is "sixty-five million, six hundred forty-one thousand, four hundred three".