66500002 has 4 divisors (see below), whose sum is σ = 99750006. Its totient is φ = 33250000.

The previous prime is 66499967. The next prime is 66500003. The reversal of 66500002 is 20000566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45441081 + 21058921 = 6741^2 + 4589^2 .

It is not an unprimeable number, because it can be changed into a prime (66500003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16624999 + ... + 16625002.

Almost surely, 2^66500002 is an apocalyptic number.

66500002 is a deficient number, since it is larger than the sum of its proper divisors (33250004).

66500002 is a wasteful number, since it uses less digits than its factorization.

66500002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33250003.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 66500002 is about 8154.7533377779. The cubic root of 66500002 is about 405.1419550138.

Adding to 66500002 its reverse (20000566), we get a palindrome (86500568).

The spelling of 66500002 in words is "sixty-six million, five hundred thousand, two".