66925037515 has 8 divisors (see below), whose sum is σ = 91782908640. Its totient is φ = 45891454272.

The previous prime is 66925037513. The next prime is 66925037527. The reversal of 66925037515 is 51573052966.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66925037515 - 2¹ = 66925037513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66925037513) 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, 956071930 + ... + 956071999.

It is an arithmetic number, because the mean of its divisors is an integer number (11472863580).

Almost surely, 2^66925037515 is an apocalyptic number.

66925037515 is a deficient number, since it is larger than the sum of its proper divisors (24857871125).

66925037515 is a wasteful number, since it uses less digits than its factorization.

66925037515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912143941.

The product of its (nonzero) digits is 1701000, while the sum is 49.

The spelling of 66925037515 in words is "sixty-six billion, nine hundred twenty-five million, thirty-seven thousand, five hundred fifteen".