7478686066 has 4 divisors (see below), whose sum is σ = 11218029102. Its totient is φ = 3739343032.

The previous prime is 7478686031. The next prime is 7478686073. The reversal of 7478686066 is 6606868747.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6606868747 = 31973 ⋅206639.

It can be written as a sum of positive squares in only one way, i.e., 5253205441 + 2225480625 = 72479^2 + 47175^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7478686066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1869671515 + ... + 1869671518.

Almost surely, 2^7478686066 is an apocalyptic number.

7478686066 is a deficient number, since it is larger than the sum of its proper divisors (3739343036).

7478686066 is a wasteful number, since it uses less digits than its factorization.

7478686066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3739343035.

The product of its (nonzero) digits is 16257024, while the sum is 58.

The square root of 7478686066 is about 86479.3967717167. The cubic root of 7478686066 is about 1955.5778117342.

The spelling of 7478686066 in words is "seven billion, four hundred seventy-eight million, six hundred eighty-six thousand, sixty-six".