65770397 has 18 divisors (see below), whose sum is σ = 84103614. Its totient is φ = 51245040.

The previous prime is 65770391. The next prime is 65770421. The reversal of 65770397 is 79307756.

It can be written as a sum of positive squares in only one way, i.e., 62900761 + 2869636 = 7931^2 + 1694^2 .

It is not a de Polignac number, because 65770397 - 2⁶ = 65770333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65770391) 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 17 ways as a sum of consecutive naturals, for example, 383 + ... + 11475.

It is an arithmetic number, because the mean of its divisors is an integer number (4672423).

Almost surely, 2^65770397 is an apocalyptic number.

It is an amenable number.

65770397 is a deficient number, since it is larger than the sum of its proper divisors (18333217).

65770397 is a wasteful number, since it uses less digits than its factorization.

65770397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11129 (or 11111 counting only the distinct ones).

The product of its (nonzero) digits is 277830, while the sum is 44.

The square root of 65770397 is about 8109.8950054856. The cubic root of 65770397 is about 403.6548309017.

The spelling of 65770397 in words is "sixty-five million, seven hundred seventy thousand, three hundred ninety-seven".