66667101040 has 40 divisors (see below), whose sum is σ = 155017689840. Its totient is φ = 26663970816.

The previous prime is 66667101019. The next prime is 66667101049. The reversal of 66667101040 is 4010176666.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×66667101040² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66667101049) 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, 802747 + ... + 881893.

It is an arithmetic number, because the mean of its divisors is an integer number (3875442246).

Almost surely, 2^66667101040 is an apocalyptic number.

It is an amenable number.

66667101040 is an abundant number, since it is smaller than the sum of its proper divisors (88350588800).

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

66667101040 is a wasteful number, since it uses less digits than its factorization.

66667101040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89689 (or 89683 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 66667101040 in words is "sixty-six billion, six hundred sixty-seven million, one hundred one thousand, forty".