66501010 has 16 divisors (see below), whose sum is σ = 120646656. Its totient is φ = 26390448.

The previous prime is 66500939. The next prime is 66501049. The reversal of 66501010 is 1010566.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24912 + ... + 27451.

It is an arithmetic number, because the mean of its divisors is an integer number (7540416).

Almost surely, 2^66501010 is an apocalyptic number.

66501010 is a deficient number, since it is larger than the sum of its proper divisors (54145646).

66501010 is a wasteful number, since it uses less digits than its factorization.

66501010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52497.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 66501010 is about 8154.8151419882. The cubic root of 66501010 is about 405.1440020364.

Adding to 66501010 its reverse (1010566), we get a palindrome (67511576).

The spelling of 66501010 in words is "sixty-six million, five hundred one thousand, ten".