66015763 has 4 divisors (see below), whose sum is σ = 72017208. Its totient is φ = 60014320.

The previous prime is 66015751. The next prime is 66015787. The reversal of 66015763 is 36751066.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66015763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66013763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3000706 + ... + 3000727.

It is an arithmetic number, because the mean of its divisors is an integer number (18004302).

Almost surely, 2^66015763 is an apocalyptic number.

66015763 is a deficient number, since it is larger than the sum of its proper divisors (6001445).

66015763 is a wasteful number, since it uses less digits than its factorization.

66015763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6001444.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 66015763 is about 8125.0084923033. The cubic root of 66015763 is about 404.1561722621.

The spelling of 66015763 in words is "sixty-six million, fifteen thousand, seven hundred sixty-three".