66760740 has 48 divisors (see below), whose sum is σ = 207701760. Its totient is φ = 17802720.

The previous prime is 66760723. The next prime is 66760741. The reversal of 66760740 is 4706766.

66760740 is a `hidden beast` number, since 6 + 6 + 7 + 607 + 40 = 666.

66760740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 66760695 and 66760704.

It is not an unprimeable number, because it can be changed into a prime (66760741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61276 + ... + 62355.

It is an arithmetic number, because the mean of its divisors is an integer number (4327120).

Almost surely, 2^66760740 is an apocalyptic number.

66760740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66760740 is an abundant number, since it is smaller than the sum of its proper divisors (140941020).

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

66760740 is a wasteful number, since it uses less digits than its factorization.

66760740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123649 (or 123641 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 66760740 is about 8170.7245700733. The cubic root of 66760740 is about 405.6707677367.

The spelling of 66760740 in words is "sixty-six million, seven hundred sixty thousand, seven hundred forty".