65651601 has 16 divisors (see below), whose sum is σ = 90256320. Its totient is φ = 42428160.

The previous prime is 65651587. The next prime is 65651611. The reversal of 65651601 is 10615656.

It is not a de Polignac number, because 65651601 - 2¹⁴ = 65635217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65651611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10381 + ... + 15461.

It is an arithmetic number, because the mean of its divisors is an integer number (5641020).

Almost surely, 2^65651601 is an apocalyptic number.

It is an amenable number.

65651601 is a deficient number, since it is larger than the sum of its proper divisors (24604719).

65651601 is a wasteful number, since it uses less digits than its factorization.

65651601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5216.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 65651601 is about 8102.5675560282. The cubic root of 65651601 is about 403.4116542270.

The spelling of 65651601 in words is "sixty-five million, six hundred fifty-one thousand, six hundred one".