66403346 has 8 divisors (see below), whose sum is σ = 103935744. Its totient is φ = 31758100.

The previous prime is 66403321. The next prime is 66403349. The reversal of 66403346 is 64330466.

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

It is not an unprimeable number, because it can be changed into a prime (66403349) 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, 721730 + ... + 721821.

It is an arithmetic number, because the mean of its divisors is an integer number (12991968).

Almost surely, 2^66403346 is an apocalyptic number.

66403346 is a deficient number, since it is larger than the sum of its proper divisors (37532398).

66403346 is a wasteful number, since it uses less digits than its factorization.

66403346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443576.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 66403346 is about 8148.8248232491. The cubic root of 66403346 is about 404.9455721198.

The spelling of 66403346 in words is "sixty-six million, four hundred three thousand, three hundred forty-six".