66770 has 16 divisors (see below), whose sum is σ = 131328. Its totient is φ = 24240.

The previous prime is 66763. The next prime is 66791. The reversal of 66770 is 7766.

It is a Curzon 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, 194 + ... + 413.

It is an arithmetic number, because the mean of its divisors is an integer number (8208).

2⁶⁶⁷⁷⁰ is an apocalyptic number.

66770 is a deficient number, since it is larger than the sum of its proper divisors (64558).

66770 is a wasteful number, since it uses less digits than its factorization.

66770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 66770 is about 258.3989164064. The cubic root of 66770 is about 40.5689522959.

It can be divided in two parts, 667 and 70, that added together give a palindrome (737).

The spelling of 66770 in words is "sixty-six thousand, seven hundred seventy".