66667406740 has 48 divisors (see below), whose sum is σ = 153754070400. Its totient is φ = 24079978880.

The previous prime is 66667406699. The next prime is 66667406749. The reversal of 66667406740 is 4760476666.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66667406749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 984112 + ... + 1049671.

It is an arithmetic number, because the mean of its divisors is an integer number (3203209800).

Almost surely, 2^66667406740 is an apocalyptic number.

It is an amenable number.

66667406740 is an abundant number, since it is smaller than the sum of its proper divisors (87086663660).

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

66667406740 is a wasteful number, since it uses less digits than its factorization.

66667406740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033952 (or 2033950 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 52.

The spelling of 66667406740 in words is "sixty-six billion, six hundred sixty-seven million, four hundred six thousand, seven hundred forty".