66010040 has 32 divisors (see below), whose sum is σ = 148869360. Its totient is φ = 26342400.

The previous prime is 66010039. The next prime is 66010057. The reversal of 66010040 is 4001066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17960 + ... + 21320.

Almost surely, 2^66010040 is an apocalyptic number.

It is an amenable number.

66010040 is an abundant number, since it is smaller than the sum of its proper divisors (82859320).

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

66010040 is a wasteful number, since it uses less digits than its factorization.

66010040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3863 (or 3859 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 66010040 is about 8124.6563004228. The cubic root of 66010040 is about 404.1444929676.

The spelling of 66010040 in words is "sixty-six million, ten thousand, forty".