65444407 has 16 divisors (see below), whose sum is σ = 82639872. Its totient is φ = 50497920.

The previous prime is 65444383. The next prime is 65444411. The reversal of 65444407 is 70444456.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65444407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65444437) 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, 9219 + ... + 14692.

It is an arithmetic number, because the mean of its divisors is an integer number (5164992).

Almost surely, 2^65444407 is an apocalyptic number.

65444407 is a deficient number, since it is larger than the sum of its proper divisors (17195465).

65444407 is a wasteful number, since it uses less digits than its factorization.

65444407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23958.

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 65444407 is about 8089.7717520336. The cubic root of 65444407 is about 402.9868229595.

The spelling of 65444407 in words is "sixty-five million, four hundred forty-four thousand, four hundred seven".