66401930 has 32 divisors (see below), whose sum is σ = 136944000. Its totient is φ = 22708800.

The previous prime is 66401917. The next prime is 66401947. The reversal of 66401930 is 3910466.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66401893 and 66401902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33980 + ... + 35880.

It is an arithmetic number, because the mean of its divisors is an integer number (4279500).

Almost surely, 2^66401930 is an apocalyptic number.

66401930 is an abundant number, since it is smaller than the sum of its proper divisors (70542070).

66401930 is a wasteful number, since it uses less digits than its factorization.

66401930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2414.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 66401930 is about 8148.7379390922. The cubic root of 66401930 is about 404.9426937156.

The spelling of 66401930 in words is "sixty-six million, four hundred one thousand, nine hundred thirty".