66651422 has 8 divisors (see below), whose sum is σ = 101863656. Its totient is φ = 32696872.

The previous prime is 66651397. The next prime is 66651427. The reversal of 66651422 is 22415666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66651427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314288 + ... + 314499.

It is an arithmetic number, because the mean of its divisors is an integer number (12732957).

Almost surely, 2^66651422 is an apocalyptic number.

66651422 is a deficient number, since it is larger than the sum of its proper divisors (35212234).

66651422 is a wasteful number, since it uses less digits than its factorization.

66651422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628842.

The product of its digits is 17280, while the sum is 32.

The square root of 66651422 is about 8164.0322145371. The cubic root of 66651422 is about 405.4492236347.

The spelling of 66651422 in words is "sixty-six million, six hundred fifty-one thousand, four hundred twenty-two".