2066528257 has 4 divisors (see below), whose sum is σ = 2070306736. Its totient is φ = 2062749780.

The previous prime is 2066528251. The next prime is 2066528263. The reversal of 2066528257 is 7528256602.

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 an interprime number because it is at equal distance from previous prime (2066528251) and next prime (2066528263).

It is a cyclic number.

It is not a de Polignac number, because 2066528257 - 2²³ = 2058139649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066528251) 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, 1888419 + ... + 1889512.

It is an arithmetic number, because the mean of its divisors is an integer number (517576684).

Almost surely, 2^2066528257 is an apocalyptic number.

It is an amenable number.

2066528257 is a deficient number, since it is larger than the sum of its proper divisors (3778479).

2066528257 is an equidigital number, since it uses as much as digits as its factorization.

2066528257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3778478.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 2066528257 is about 45459.0833277575. The cubic root of 2066528257 is about 1273.7390084581.

The spelling of 2066528257 in words is "two billion, sixty-six million, five hundred twenty-eight thousand, two hundred fifty-seven".