64065725 has 6 divisors (see below), whose sum is σ = 79441530. Its totient is φ = 51252560.

The previous prime is 64065713. The next prime is 64065733. The reversal of 64065725 is 52756046.

It can be written as a sum of positive squares in 3 ways, for example, as 19483396 + 44582329 = 4414^2 + 6677^2 .

It is not a de Polignac number, because 64065725 - 2¹² = 64061629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1281290 + ... + 1281339.

It is an arithmetic number, because the mean of its divisors is an integer number (13240255).

Almost surely, 2^64065725 is an apocalyptic number.

It is an amenable number.

64065725 is a deficient number, since it is larger than the sum of its proper divisors (15375805).

64065725 is a wasteful number, since it uses less digits than its factorization.

64065725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562639 (or 2562634 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 64065725 is about 8004.1067584085. The cubic root of 64065725 is about 400.1368802375.

The spelling of 64065725 in words is "sixty-four million, sixty-five thousand, seven hundred twenty-five".