66835020740 has 12 divisors (see below), whose sum is σ = 140353543596. Its totient is φ = 26734008288.

The previous prime is 66835020727. The next prime is 66835020743. The reversal of 66835020740 is 4702053866.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21626055364 + 45208965376 = 147058^2 + 212624^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (66835020743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1670875499 + ... + 1670875538.

It is an arithmetic number, because the mean of its divisors is an integer number (11696128633).

Almost surely, 2^66835020740 is an apocalyptic number.

It is an amenable number.

66835020740 is an abundant number, since it is smaller than the sum of its proper divisors (73518522856).

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

66835020740 is a wasteful number, since it uses less digits than its factorization.

66835020740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341751046 (or 3341751044 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 66835020740 in words is "sixty-six billion, eight hundred thirty-five million, twenty thousand, seven hundred forty".