66938097 has 4 divisors (see below), whose sum is σ = 89250800. Its totient is φ = 44625396.

The previous prime is 66938093. The next prime is 66938107. The reversal of 66938097 is 79083966.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66938097 - 2² = 66938093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66938093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11156347 + ... + 11156352.

It is an arithmetic number, because the mean of its divisors is an integer number (22312700).

Almost surely, 2^66938097 is an apocalyptic number.

It is an amenable number.

66938097 is a deficient number, since it is larger than the sum of its proper divisors (22312703).

66938097 is a wasteful number, since it uses less digits than its factorization.

66938097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22312702.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 66938097 is about 8181.5705704956. The cubic root of 66938097 is about 406.0296859234.

The spelling of 66938097 in words is "sixty-six million, nine hundred thirty-eight thousand, ninety-seven".