65403857 has 8 divisors (see below), whose sum is σ = 66548736. Its totient is φ = 64269072.

The previous prime is 65403829. The next prime is 65403869. The reversal of 65403857 is 75830456.

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 65403857 - 2¹⁰ = 65402833 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 65403857.

It is not an unprimeable number, because it can be changed into a prime (65406857) 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, 11183 + ... + 15995.

It is an arithmetic number, because the mean of its divisors is an integer number (8318592).

Almost surely, 2^65403857 is an apocalyptic number.

It is an amenable number.

65403857 is a deficient number, since it is larger than the sum of its proper divisors (1144879).

65403857 is a wasteful number, since it uses less digits than its factorization.

65403857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5047.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 65403857 is about 8087.2651125087. The cubic root of 65403857 is about 402.9035742266.

The spelling of 65403857 in words is "sixty-five million, four hundred three thousand, eight hundred fifty-seven".