66500015660602 has 4 divisors (see below), whose sum is σ = 99750023490906. Its totient is φ = 33250007830300.

The previous prime is 66500015660599. The next prime is 66500015660633. The reversal of 66500015660602 is 20606651000566.

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

It can be written as a sum of positive squares in only one way, i.e., 64845188127801 + 1654827532801 = 8052651^2 + 1286401^2 .

It is a super-2 number, since 2×66500015660602² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16625003915149 + ... + 16625003915152.

Almost surely, 2^{66500015660602} is an apocalyptic number.

66500015660602 is a deficient number, since it is larger than the sum of its proper divisors (33250007830304).

66500015660602 is a wasteful number, since it uses less digits than its factorization.

66500015660602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33250007830303.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 66500015660602 in words is "sixty-six trillion, five hundred billion, fifteen million, six hundred sixty thousand, six hundred two".