66374402415 has 8 divisors (see below), whose sum is σ = 106199043888. Its totient is φ = 35399681280.

The previous prime is 66374402407. The next prime is 66374402417. The reversal of 66374402415 is 51420447366.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66374402415 - 2³ = 66374402407 is a prime.

It is a super-2 number, since 2×66374402415² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66374402417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2212480066 + ... + 2212480095.

It is an arithmetic number, because the mean of its divisors is an integer number (13274880486).

Almost surely, 2^66374402415 is an apocalyptic number.

66374402415 is a deficient number, since it is larger than the sum of its proper divisors (39824641473).

66374402415 is a wasteful number, since it uses less digits than its factorization.

66374402415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4424960169.

The product of its (nonzero) digits is 483840, while the sum is 42.

The spelling of 66374402415 in words is "sixty-six billion, three hundred seventy-four million, four hundred two thousand, four hundred fifteen".