66752415 has 48 divisors (see below), whose sum is σ = 123158880. Its totient is φ = 33350400.

The previous prime is 66752401. The next prime is 66752429. The reversal of 66752415 is 51425766.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66752401) and next prime (66752429).

It is not a de Polignac number, because 66752415 - 2⁶ = 66752351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66752415.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 85969 + ... + 86741.

It is an arithmetic number, because the mean of its divisors is an integer number (2565810).

Almost surely, 2^66752415 is an apocalyptic number.

66752415 is a deficient number, since it is larger than the sum of its proper divisors (56406465).

66752415 is a wasteful number, since it uses less digits than its factorization.

66752415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904 (or 901 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 66752415 is about 8170.2151134471. The cubic root of 66752415 is about 405.6539047844.

The spelling of 66752415 in words is "sixty-six million, seven hundred fifty-two thousand, four hundred fifteen".