64401705 has 12 divisors (see below), whose sum is σ = 111629700. Its totient is φ = 34347552.

The previous prime is 64401683. The next prime is 64401709. The reversal of 64401705 is 50710446.

64401705 is a `hidden beast` number, since 644 + 0 + 17 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25613721 + 38787984 = 5061^2 + 6228^2 .

It is not a de Polignac number, because 64401705 - 2⁶ = 64401641 is a prime.

It is a super-3 number, since 3×64401705³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (64401709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 715530 + ... + 715619.

It is an arithmetic number, because the mean of its divisors is an integer number (9302475).

Almost surely, 2^64401705 is an apocalyptic number.

It is an amenable number.

64401705 is a deficient number, since it is larger than the sum of its proper divisors (47227995).

64401705 is a wasteful number, since it uses less digits than its factorization.

64401705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431160 (or 1431157 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 64401705 is about 8025.0672894375. The cubic root of 64401705 is about 400.8351405538.

The spelling of 64401705 in words is "sixty-four million, four hundred one thousand, seven hundred five".