64244661 has 8 divisors (see below), whose sum is σ = 92248800. Its totient is φ = 39535152.

The previous prime is 64244633. The next prime is 64244671. The reversal of 64244661 is 16644246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64244661 - 2⁶ = 64244597 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 (64244671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 823611 + ... + 823688.

It is an arithmetic number, because the mean of its divisors is an integer number (11531100).

Almost surely, 2^64244661 is an apocalyptic number.

It is an amenable number.

64244661 is a deficient number, since it is larger than the sum of its proper divisors (28004139).

64244661 is a wasteful number, since it uses less digits than its factorization.

64244661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647315.

The product of its digits is 27648, while the sum is 33.

The square root of 64244661 is about 8015.2767263520. The cubic root of 64244661 is about 400.5090622808.

The spelling of 64244661 in words is "sixty-four million, two hundred forty-four thousand, six hundred sixty-one".