66423490 has 16 divisors (see below), whose sum is σ = 136642752. Its totient is φ = 22773744.

The previous prime is 66423481. The next prime is 66423493. The reversal of 66423490 is 9432466.

It is not an unprimeable number, because it can be changed into a prime (66423493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474384 + ... + 474523.

It is an arithmetic number, because the mean of its divisors is an integer number (8540172).

Almost surely, 2^66423490 is an apocalyptic number.

66423490 is an abundant number, since it is smaller than the sum of its proper divisors (70219262).

66423490 is a wasteful number, since it uses less digits than its factorization.

66423490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948921.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 66423490 is about 8150.0607359700. The cubic root of 66423490 is about 404.9865158341.

The spelling of 66423490 in words is "sixty-six million, four hundred twenty-three thousand, four hundred ninety".