66469438 has 16 divisors (see below), whose sum is σ = 114186240. Its totient is φ = 28427256.

The previous prime is 66469433. The next prime is 66469451. The reversal of 66469438 is 83496466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66469433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2323 + ... + 11761.

It is an arithmetic number, because the mean of its divisors is an integer number (7136640).

Almost surely, 2^66469438 is an apocalyptic number.

66469438 is a deficient number, since it is larger than the sum of its proper divisors (47716802).

66469438 is a wasteful number, since it uses less digits than its factorization.

66469438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9951.

The product of its digits is 746496, while the sum is 46.

The square root of 66469438 is about 8152.8791233527. The cubic root of 66469438 is about 405.0798765381.

The spelling of 66469438 in words is "sixty-six million, four hundred sixty-nine thousand, four hundred thirty-eight".