66602465 has 4 divisors (see below), whose sum is σ = 79922964. Its totient is φ = 53281968.

The previous prime is 66602443. The next prime is 66602537. The reversal of 66602465 is 56420666.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28174864 + 38427601 = 5308^2 + 6199^2 .

It is a cyclic number.

It is not a de Polignac number, because 66602465 - 2⁶ = 66602401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6660242 + ... + 6660251.

It is an arithmetic number, because the mean of its divisors is an integer number (19980741).

Almost surely, 2^66602465 is an apocalyptic number.

It is an amenable number.

66602465 is a deficient number, since it is larger than the sum of its proper divisors (13320499).

66602465 is a wasteful number, since it uses less digits than its factorization.

66602465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13320498.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 66602465 is about 8161.0333291808. The cubic root of 66602465 is about 405.3499287309.

The spelling of 66602465 in words is "sixty-six million, six hundred two thousand, four hundred sixty-five".