64420621 has 8 divisors (see below), whose sum is σ = 68136800. Its totient is φ = 60737040.

The previous prime is 64420619. The next prime is 64420627. The reversal of 64420621 is 12602446.

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

It is a cyclic number.

It is not a de Polignac number, because 64420621 - 2¹ = 64420619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64420627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4026 + ... + 12043.

It is an arithmetic number, because the mean of its divisors is an integer number (8517100).

Almost surely, 2^64420621 is an apocalyptic number.

It is an amenable number.

64420621 is a deficient number, since it is larger than the sum of its proper divisors (3716179).

64420621 is a wasteful number, since it uses less digits than its factorization.

64420621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16299.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 64420621 is about 8026.2457600051. The cubic root of 64420621 is about 400.8743810019.

The spelling of 64420621 in words is "sixty-four million, four hundred twenty thousand, six hundred twenty-one".