66992733 has 12 divisors (see below), whose sum is σ = 102459708. Its totient is φ = 42034560.

The previous prime is 66992713. The next prime is 66992743. The reversal of 66992733 is 33729966.

It can be written as a sum of positive squares in 2 ways, for example, as 57426084 + 9566649 = 7578^2 + 3093^2 .

It is not a de Polignac number, because 66992733 - 2⁶ = 66992669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66992713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 218778 + ... + 219083.

It is an arithmetic number, because the mean of its divisors is an integer number (8538309).

Almost surely, 2^66992733 is an apocalyptic number.

It is an amenable number.

66992733 is a deficient number, since it is larger than the sum of its proper divisors (35466975).

66992733 is a wasteful number, since it uses less digits than its factorization.

66992733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437884 (or 437881 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 66992733 is about 8184.9088571590. The cubic root of 66992733 is about 406.1401252997.

The spelling of 66992733 in words is "sixty-six million, nine hundred ninety-two thousand, seven hundred thirty-three".