66374804 has 6 divisors (see below), whose sum is σ = 116155914. Its totient is φ = 33187400.

The previous prime is 66374779. The next prime is 66374807. The reversal of 66374804 is 40847366.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 63170704 + 3204100 = 7948^2 + 1790^2 .

It is a super-2 number, since 2×66374804² = 8811229212076832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66374807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8296847 + ... + 8296854.

It is an arithmetic number, because the mean of its divisors is an integer number (19359319).

Almost surely, 2^66374804 is an apocalyptic number.

It is an amenable number.

66374804 is a deficient number, since it is larger than the sum of its proper divisors (49781110).

66374804 is a wasteful number, since it uses less digits than its factorization.

66374804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16593705 (or 16593703 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 66374804 is about 8147.0733395496. The cubic root of 66374804 is about 404.8875448587.

The spelling of 66374804 in words is "sixty-six million, three hundred seventy-four thousand, eight hundred four".