66363554 has 8 divisors (see below), whose sum is σ = 101232720. Its totient is φ = 32619316.

The previous prime is 66363553. The next prime is 66363589. The reversal of 66363554 is 45536366.

It is a happy number.

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 (66363551) 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, 281084 + ... + 281319.

It is an arithmetic number, because the mean of its divisors is an integer number (12654090).

Almost surely, 2^66363554 is an apocalyptic number.

66363554 is a deficient number, since it is larger than the sum of its proper divisors (34869166).

66363554 is a wasteful number, since it uses less digits than its factorization.

66363554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562464.

The product of its digits is 194400, while the sum is 38.

The square root of 66363554 is about 8146.3828783086. The cubic root of 66363554 is about 404.8646684961.

The spelling of 66363554 in words is "sixty-six million, three hundred sixty-three thousand, five hundred fifty-four".