66511030 has 32 divisors (see below), whose sum is σ = 122277600. Its totient is φ = 26042112.

The previous prime is 66511019. The next prime is 66511031. The reversal of 66511030 is 3011566.

It is a super-2 number, since 2×66511030² = 8847434223321800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66510992 and 66511010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66511031) 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, 130416 + ... + 130924.

It is an arithmetic number, because the mean of its divisors is an integer number (3821175).

Almost surely, 2^66511030 is an apocalyptic number.

66511030 is a deficient number, since it is larger than the sum of its proper divisors (55766570).

66511030 is a wasteful number, since it uses less digits than its factorization.

66511030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 66511030 is about 8155.4294798006. The cubic root of 66511030 is about 405.1643492914.

Adding to 66511030 its reverse (3011566), we get a palindrome (69522596).

The spelling of 66511030 in words is "sixty-six million, five hundred eleven thousand, thirty".