76666633 has 4 divisors (see below), whose sum is σ = 79310340. Its totient is φ = 74022928.

The previous prime is 76666631. The next prime is 76666637. The reversal of 76666633 is 33666667.

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 43454464 + 33212169 = 6592^2 + 5763^2 .

It is a cyclic number.

It is not a de Polignac number, because 76666633 - 2¹ = 76666631 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 76666633.

It is not an unprimeable number, because it can be changed into a prime (76666631) 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, 1321810 + ... + 1321867.

It is an arithmetic number, because the mean of its divisors is an integer number (19827585).

Almost surely, 2^76666633 is an apocalyptic number.

It is an amenable number.

76666633 is a deficient number, since it is larger than the sum of its proper divisors (2643707).

76666633 is a wasteful number, since it uses less digits than its factorization.

76666633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643706.

The product of its digits is 489888, while the sum is 43.

The square root of 76666633 is about 8755.9484352068. The cubic root of 76666633 is about 424.8172372194.

The spelling of 76666633 in words is "seventy-six million, six hundred sixty-six thousand, six hundred thirty-three".