66454942 has 8 divisors (see below), whose sum is σ = 99910800. Its totient is φ = 33151344.

The previous prime is 66454939. The next prime is 66454943. The reversal of 66454942 is 24945466.

It is a happy number.

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 = 66454895 and 66454904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66454943) 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, 36967 + ... + 38722.

It is an arithmetic number, because the mean of its divisors is an integer number (12488850).

Almost surely, 2^66454942 is an apocalyptic number.

66454942 is a deficient number, since it is larger than the sum of its proper divisors (33455858).

66454942 is a wasteful number, since it uses less digits than its factorization.

66454942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76130.

The product of its digits is 207360, while the sum is 40.

The square root of 66454942 is about 8151.9900637820. The cubic root of 66454942 is about 405.0504270899.

The spelling of 66454942 in words is "sixty-six million, four hundred fifty-four thousand, nine hundred forty-two".