66378652 has 12 divisors (see below), whose sum is σ = 117360880. Its totient is φ = 32846976.

The previous prime is 66378643. The next prime is 66378661. The reversal of 66378652 is 25687366.

It is an interprime number because it is at equal distance from previous prime (66378643) and next prime (66378661).

It is a super-2 number, since 2×66378652² = 8812250882674208, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66378599 and 66378608.

It is a congruent number.

It is an unprimeable number.

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, 85152 + ... + 85927.

Almost surely, 2^66378652 is an apocalyptic number.

It is an amenable number.

66378652 is a deficient number, since it is larger than the sum of its proper divisors (50982228).

66378652 is a wasteful number, since it uses less digits than its factorization.

66378652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171180 (or 171178 counting only the distinct ones).

The product of its digits is 362880, while the sum is 43.

The square root of 66378652 is about 8147.3094945509. The cubic root of 66378652 is about 404.8953689981.

The spelling of 66378652 in words is "sixty-six million, three hundred seventy-eight thousand, six hundred fifty-two".