66495701 has 4 divisors (see below), whose sum is σ = 66794112. Its totient is φ = 66197292.

The previous prime is 66495683. The next prime is 66495707. The reversal of 66495701 is 10759466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66495701 - 2¹⁴ = 66479317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66495707) 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, 148871 + ... + 149316.

It is an arithmetic number, because the mean of its divisors is an integer number (16698528).

Almost surely, 2^66495701 is an apocalyptic number.

It is an amenable number.

66495701 is a deficient number, since it is larger than the sum of its proper divisors (298411).

66495701 is a wasteful number, since it uses less digits than its factorization.

66495701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298410.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 66495701 is about 8154.4896222878. The cubic root of 66495701 is about 405.1332204119.

The spelling of 66495701 in words is "sixty-six million, four hundred ninety-five thousand, seven hundred one".