64675555 has 16 divisors (see below), whose sum is σ = 90154944. Its totient is φ = 43620480.

The previous prime is 64675553. The next prime is 64675561. The reversal of 64675555 is 55557646.

It is not a de Polignac number, because 64675555 - 2¹ = 64675553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64675553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13012 + ... + 17281.

It is an arithmetic number, because the mean of its divisors is an integer number (5634684).

Almost surely, 2^64675555 is an apocalyptic number.

64675555 is a deficient number, since it is larger than the sum of its proper divisors (25479389).

64675555 is a wasteful number, since it uses less digits than its factorization.

64675555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30366.

The product of its digits is 630000, while the sum is 43.

The square root of 64675555 is about 8042.1113521264. Note that the first 3 decimals coincide. The cubic root of 64675555 is about 401.4024831057.

The spelling of 64675555 in words is "sixty-four million, six hundred seventy-five thousand, five hundred fifty-five".