66413030677646 has 8 divisors (see below), whose sum is σ = 99619581125304. Its totient is φ = 33206503635880.

The previous prime is 66413030677639. The next prime is 66413030677649. The reversal of 66413030677646 is 64677603031466.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66413030677649) 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, 6236036 + ... + 13103976.

It is an arithmetic number, because the mean of its divisors is an integer number (12452447640663).

Almost surely, 2^{66413030677646} is an apocalyptic number.

66413030677646 is a deficient number, since it is larger than the sum of its proper divisors (33206550447658).

66413030677646 is a wasteful number, since it uses less digits than its factorization.

66413030677646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11702946.

The product of its (nonzero) digits is 54867456, while the sum is 59.

The spelling of 66413030677646 in words is "sixty-six trillion, four hundred thirteen billion, thirty million, six hundred seventy-seven thousand, six hundred forty-six".