66007748602 has 4 divisors (see below), whose sum is σ = 99011622906. Its totient is φ = 33003874300.

The previous prime is 66007748539. The next prime is 66007748617. The reversal of 66007748602 is 20684770066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20684770066 = 2 ⋅10342385033.

It can be written as a sum of positive squares in only one way, i.e., 45113335201 + 20894413401 = 212399^2 + 144549^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16501937149 + ... + 16501937152.

Almost surely, 2^66007748602 is an apocalyptic number.

66007748602 is a deficient number, since it is larger than the sum of its proper divisors (33003874304).

66007748602 is a wasteful number, since it uses less digits than its factorization.

66007748602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33003874303.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 66007748602 in words is "sixty-six billion, seven million, seven hundred forty-eight thousand, six hundred two".