66751426 has 12 divisors (see below), whose sum is σ = 116474598. Its totient is φ = 28607712.

The previous prime is 66751369. The next prime is 66751429. The reversal of 66751426 is 62415766.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 54745201 + 12006225 = 7399^2 + 3465^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66751429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 340471 + ... + 340666.

Almost surely, 2^66751426 is an apocalyptic number.

66751426 is a deficient number, since it is larger than the sum of its proper divisors (49723172).

66751426 is a wasteful number, since it uses less digits than its factorization.

66751426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681153 (or 681146 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 66751426 is about 8170.1545885008. The cubic root of 66751426 is about 405.6519013927.

The spelling of 66751426 in words is "sixty-six million, seven hundred fifty-one thousand, four hundred twenty-six".