7366666638 has 8 divisors (see below), whose sum is σ = 14733333288. Its totient is φ = 2455555544.

The previous prime is 7366666633. The next prime is 7366666639. The reversal of 7366666638 is 8366666637.

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

7366666638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7366666633) 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, 613888881 + ... + 613888892.

It is an arithmetic number, because the mean of its divisors is an integer number (1841666661).

Almost surely, 2^7366666638 is an apocalyptic number.

7366666638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7366666638 is a wasteful number, since it uses less digits than its factorization.

7366666638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227777778.

The product of its digits is 23514624, while the sum is 57.

The square root of 7366666638 is about 85829.2877635601. The cubic root of 7366666638 is about 1945.7647847676.

Subtracting 7366666638 from its reverse (8366666637), we obtain a palindrome (999999999).

The spelling of 7366666638 in words is "seven billion, three hundred sixty-six million, six hundred sixty-six thousand, six hundred thirty-eight".