66770276 has 6 divisors (see below), whose sum is σ = 116847990. Its totient is φ = 33385136.

The previous prime is 66770273. The next prime is 66770279. The reversal of 66770276 is 67207766.

It is an interprime number because it is at equal distance from previous prime (66770273) and next prime (66770279).

It can be written as a sum of positive squares in only one way, i.e., 41267776 + 25502500 = 6424^2 + 5050^2 .

It is not an unprimeable number, because it can be changed into a prime (66770273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8346281 + ... + 8346288.

It is an arithmetic number, because the mean of its divisors is an integer number (19474665).

Almost surely, 2^66770276 is an apocalyptic number.

It is an amenable number.

66770276 is a deficient number, since it is larger than the sum of its proper divisors (50077714).

66770276 is a wasteful number, since it uses less digits than its factorization.

66770276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16692573 (or 16692571 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 41.

The square root of 66770276 is about 8171.3080960150. The cubic root of 66770276 is about 405.6900819437.

The spelling of 66770276 in words is "sixty-six million, seven hundred seventy thousand, two hundred seventy-six".