66002765 has 8 divisors (see below), whose sum is σ = 79251480. Its totient is φ = 52770112.

The previous prime is 66002759. The next prime is 66002767. The reversal of 66002765 is 56720066.

It can be written as a sum of positive squares in 4 ways, for example, as 17825284 + 48177481 = 4222^2 + 6941^2 .

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 66002765 - 2¹⁶ = 65937229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66002767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8687 + ... + 14403.

It is an arithmetic number, because the mean of its divisors is an integer number (9906435).

Almost surely, 2^66002765 is an apocalyptic number.

It is an amenable number.

66002765 is a deficient number, since it is larger than the sum of its proper divisors (13248715).

66002765 is a wasteful number, since it uses less digits than its factorization.

66002765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8031.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 66002765 is about 8124.2085768400. The cubic root of 66002765 is about 404.1296454322.

The spelling of 66002765 in words is "sixty-six million, two thousand, seven hundred sixty-five".