66345404 has 6 divisors (see below), whose sum is σ = 116104464. Its totient is φ = 33172700.

The previous prime is 66345371. The next prime is 66345413. The reversal of 66345404 is 40454366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8293172 + ... + 8293179.

It is an arithmetic number, because the mean of its divisors is an integer number (19350744).

Almost surely, 2^66345404 is an apocalyptic number.

It is an amenable number.

66345404 is a deficient number, since it is larger than the sum of its proper divisors (49759060).

66345404 is a wasteful number, since it uses less digits than its factorization.

66345404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16586355 (or 16586353 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 66345404 is about 8145.2688107883. The cubic root of 66345404 is about 404.8277558470.

The spelling of 66345404 in words is "sixty-six million, three hundred forty-five thousand, four hundred four".