65610631 has 2 divisors, whose sum is σ = 65610632. Its totient is φ = 65610630.

The previous prime is 65610617. The next prime is 65610683. The reversal of 65610631 is 13601656.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65610631 is a prime.

It is a super-2 number, since 2×65610631² = 8609509800436322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65610631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65610031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32805315 + 32805316.

It is an arithmetic number, because the mean of its divisors is an integer number (32805316).

Almost surely, 2^65610631 is an apocalyptic number.

65610631 is a deficient number, since it is larger than the sum of its proper divisors (1).

65610631 is an equidigital number, since it uses as much as digits as its factorization.

65610631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 65610631 is about 8100.0389505236. The cubic root of 65610631 is about 403.3277201747.

The spelling of 65610631 in words is "sixty-five million, six hundred ten thousand, six hundred thirty-one".