66710404 has 6 divisors (see below), whose sum is σ = 116743214. Its totient is φ = 33355200.

The previous prime is 66710401. The next prime is 66710407. The reversal of 66710404 is 40401766.

It is an interprime number because it is at equal distance from previous prime (66710401) and next prime (66710407).

It can be written as a sum of positive squares in only one way, i.e., 50694400 + 16016004 = 7120^2 + 4002^2 .

It is not an unprimeable number, because it can be changed into a prime (66710401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8338797 + ... + 8338804.

Almost surely, 2^66710404 is an apocalyptic number.

It is an amenable number.

66710404 is a deficient number, since it is larger than the sum of its proper divisors (50032810).

66710404 is a wasteful number, since it uses less digits than its factorization.

66710404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16677605 (or 16677603 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 66710404 is about 8167.6437238655. The cubic root of 66710404 is about 405.5687867524.

The spelling of 66710404 in words is "sixty-six million, seven hundred ten thousand, four hundred four".