65685001 has 4 divisors (see below), whose sum is σ = 67803904. Its totient is φ = 63566100.

The previous prime is 65684981. The next prime is 65685017. The reversal of 65685001 is 10058656.

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 a de Polignac number, because none of the positive numbers 2^k-65685001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 2118871 = 65685001 / (6 + 5 + 6 + 8 + 5 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65685601) 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, 1059405 + ... + 1059466.

It is an arithmetic number, because the mean of its divisors is an integer number (16950976).

Almost surely, 2^65685001 is an apocalyptic number.

65685001 is the 3625-th centered decagonal number.

It is an amenable number.

65685001 is a deficient number, since it is larger than the sum of its proper divisors (2118903).

65685001 is a wasteful number, since it uses less digits than its factorization.

65685001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118902.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 65685001 is about 8104.6283690247. The cubic root of 65685001 is about 403.4800540058.

The spelling of 65685001 in words is "sixty-five million, six hundred eighty-five thousand, one".