66946123830 has 16 divisors (see below), whose sum is σ = 160670697264. Its totient is φ = 17852299680.

The previous prime is 66946123823. The next prime is 66946123837. The reversal of 66946123830 is 3832164966.

66946123830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66946123823) and next prime (66946123837).

It is a self number, because there is not a number n which added to its sum of digits gives 66946123830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66946123837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1115768701 + ... + 1115768760.

It is an arithmetic number, because the mean of its divisors is an integer number (10041918579).

Almost surely, 2^66946123830 is an apocalyptic number.

66946123830 is an abundant number, since it is smaller than the sum of its proper divisors (93724573434).

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

66946123830 is a wasteful number, since it uses less digits than its factorization.

66946123830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231537471.

The product of its (nonzero) digits is 1119744, while the sum is 48.

The spelling of 66946123830 in words is "sixty-six billion, nine hundred forty-six million, one hundred twenty-three thousand, eight hundred thirty".