66770760 has 128 divisors (see below), whose sum is σ = 236908800. Its totient is φ = 14730240.

The previous prime is 66770723. The next prime is 66770777. The reversal of 66770760 is 6707766.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22990 + ... + 25730.

It is an arithmetic number, because the mean of its divisors is an integer number (1850850).

Almost surely, 2^66770760 is an apocalyptic number.

66770760 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66770760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118454400).

66770760 is an abundant number, since it is smaller than the sum of its proper divisors (170138040).

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

66770760 is a wasteful number, since it uses less digits than its factorization.

66770760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791 (or 2787 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 39.

The square root of 66770760 is about 8171.3377117826. The cubic root of 66770760 is about 405.6910621879.

The spelling of 66770760 in words is "sixty-six million, seven hundred seventy thousand, seven hundred sixty".