2527021661 has 16 divisors (see below), whose sum is σ = 2799650304. Its totient is φ = 2268735744.

The previous prime is 2527021657. The next prime is 2527021667. The reversal of 2527021661 is 1661207252.

It is a cyclic number.

It is not a de Polignac number, because 2527021661 - 2² = 2527021657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2527021667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137180 + ... + 154506.

It is an arithmetic number, because the mean of its divisors is an integer number (174978144).

Almost surely, 2^2527021661 is an apocalyptic number.

It is an amenable number.

2527021661 is a deficient number, since it is larger than the sum of its proper divisors (272628643).

2527021661 is a wasteful number, since it uses less digits than its factorization.

2527021661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17740.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 2527021661 is about 50269.4903594616. The cubic root of 2527021661 is about 1362.0811671817.

The spelling of 2527021661 in words is "two billion, five hundred twenty-seven million, twenty-one thousand, six hundred sixty-one".