66455842 has 8 divisors (see below), whose sum is σ = 101049516. Its totient is φ = 32772672.

The previous prime is 66455833. The next prime is 66455843. The reversal of 66455842 is 24855466.

It can be written as a sum of positive squares in 2 ways, for example, as 66243321 + 212521 = 8139^2 + 461^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 66455795 and 66455804.

It is not an unprimeable number, because it can be changed into a prime (66455843) 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, 227443 + ... + 227734.

Almost surely, 2^66455842 is an apocalyptic number.

66455842 is a deficient number, since it is larger than the sum of its proper divisors (34593674).

66455842 is a wasteful number, since it uses less digits than its factorization.

66455842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455252.

The product of its digits is 230400, while the sum is 40.

The square root of 66455842 is about 8152.0452648400. The cubic root of 66455842 is about 405.0522556157.

The spelling of 66455842 in words is "sixty-six million, four hundred fifty-five thousand, eight hundred forty-two".