66763660 has 24 divisors (see below), whose sum is σ = 140985936. Its totient is φ = 26556480.

The previous prime is 66763657. The next prime is 66763661. The reversal of 66763660 is 6636766.

It is not an unprimeable number, because it can be changed into a prime (66763661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5602 + ... + 12841.

It is an arithmetic number, because the mean of its divisors is an integer number (5874414).

Almost surely, 2^66763660 is an apocalyptic number.

It is an amenable number.

66763660 is an abundant number, since it is smaller than the sum of its proper divisors (74222276).

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

66763660 is a wasteful number, since it uses less digits than its factorization.

66763660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18633 (or 18631 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 40.

The square root of 66763660 is about 8170.9032548428. The cubic root of 66763660 is about 405.6766820978.

The spelling of 66763660 in words is "sixty-six million, seven hundred sixty-three thousand, six hundred sixty".