66401358 has 32 divisors (see below), whose sum is σ = 137894400. Its totient is φ = 21290976.

The previous prime is 66401353. The next prime is 66401369. The reversal of 66401358 is 85310466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66401353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61935 + ... + 62997.

It is an arithmetic number, because the mean of its divisors is an integer number (4309200).

Almost surely, 2^66401358 is an apocalyptic number.

66401358 is an abundant number, since it is smaller than the sum of its proper divisors (71493042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66401358 is a wasteful number, since it uses less digits than its factorization.

66401358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 66401358 is about 8148.7028415571. The cubic root of 66401358 is about 404.9415309588.

The spelling of 66401358 in words is "sixty-six million, four hundred one thousand, three hundred fifty-eight".