66379297 has 4 divisors (see below), whose sum is σ = 66423700. Its totient is φ = 66334896.

The previous prime is 66379283. The next prime is 66379301. The reversal of 66379297 is 79297366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51969681 + 14409616 = 7209^2 + 3796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66379297 is a prime.

It is a super-2 number, since 2×66379297² = 8812422140428418, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66379297.

It is not an unprimeable number, because it can be changed into a prime (66379207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19878 + ... + 22975.

It is an arithmetic number, because the mean of its divisors is an integer number (16605925).

Almost surely, 2^66379297 is an apocalyptic number.

It is an amenable number.

66379297 is a deficient number, since it is larger than the sum of its proper divisors (44403).

66379297 is a wasteful number, since it uses less digits than its factorization.

66379297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44402.

The product of its digits is 857304, while the sum is 49.

The square root of 66379297 is about 8147.3490780744. The cubic root of 66379297 is about 404.8966804472.

The spelling of 66379297 in words is "sixty-six million, three hundred seventy-nine thousand, two hundred ninety-seven".