66651164 has 24 divisors (see below), whose sum is σ = 127016400. Its totient is φ = 30481920.

The previous prime is 66651119. The next prime is 66651253. The reversal of 66651164 is 46115666.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 12917 + ... + 17324.

It is an arithmetic number, because the mean of its divisors is an integer number (5292350).

Almost surely, 2^66651164 is an apocalyptic number.

It is an amenable number.

66651164 is a deficient number, since it is larger than the sum of its proper divisors (60365236).

66651164 is a wasteful number, since it uses less digits than its factorization.

66651164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30293 (or 30291 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 66651164 is about 8164.0164135063. The cubic root of 66651164 is about 405.4487004849.

The spelling of 66651164 in words is "sixty-six million, six hundred fifty-one thousand, one hundred sixty-four".