66662345 has 8 divisors (see below), whose sum is σ = 82157064. Its totient is φ = 51888384.

The previous prime is 66662327. The next prime is 66662353. The reversal of 66662345 is 54326666.

It can be written as a sum of positive squares in 4 ways, for example, as 24840256 + 41822089 = 4984^2 + 6467^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66662345 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66662299 and 66662308.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 179984 + ... + 180353.

It is an arithmetic number, because the mean of its divisors is an integer number (10269633).

Almost surely, 2^66662345 is an apocalyptic number.

It is an amenable number.

66662345 is a deficient number, since it is larger than the sum of its proper divisors (15494719).

66662345 is a wasteful number, since it uses less digits than its factorization.

66662345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360379.

The product of its digits is 155520, while the sum is 38.

The square root of 66662345 is about 8164.7011580339. The cubic root of 66662345 is about 405.4713710990.

The spelling of 66662345 in words is "sixty-six million, six hundred sixty-two thousand, three hundred forty-five".