66241660 has 48 divisors (see below), whose sum is σ = 143589600. Its totient is φ = 25657344.

The previous prime is 66241631. The next prime is 66241687. The reversal of 66241660 is 6614266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85756 + ... + 86524.

It is an arithmetic number, because the mean of its divisors is an integer number (2991450).

Almost surely, 2^66241660 is an apocalyptic number.

It is an amenable number.

66241660 is an abundant number, since it is smaller than the sum of its proper divisors (77347940).

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

66241660 is a wasteful number, since it uses less digits than its factorization.

66241660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 66241660 is about 8138.8979597978. The cubic root of 66241660 is about 404.6166366731.

The spelling of 66241660 in words is "sixty-six million, two hundred forty-one thousand, six hundred sixty".