64454661 has 6 divisors (see below), whose sum is σ = 93101190. Its totient is φ = 42969768.

The previous prime is 64454653. The next prime is 64454683. The reversal of 64454661 is 16645446.

64454661 is a `hidden beast` number, since 644 + 5 + 4 + 6 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 63202500 + 1252161 = 7950^2 + 1119^2 .

It is not a de Polignac number, because 64454661 - 2³ = 64454653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64454641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3580806 + ... + 3580823.

It is an arithmetic number, because the mean of its divisors is an integer number (15516865).

Almost surely, 2^64454661 is an apocalyptic number.

It is an amenable number.

64454661 is a deficient number, since it is larger than the sum of its proper divisors (28646529).

64454661 is a wasteful number, since it uses less digits than its factorization.

64454661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7161635 (or 7161632 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 64454661 is about 8028.3660230460. The cubic root of 64454661 is about 400.9449762086.

The spelling of 64454661 in words is "sixty-four million, four hundred fifty-four thousand, six hundred sixty-one".