2171660007 has 16 divisors (see below), whose sum is σ = 3164476032. Its totient is φ = 1313783520.

The previous prime is 2171659999. The next prime is 2171660017. The reversal of 2171660007 is 7000661712.

It is a happy number.

2171660007 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2171660007 - 2³ = 2171659999 is a prime.

It is a super-2 number, since 2×2171660007² = 9432214372006480098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171660017) 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, 40693 + ... + 77454.

It is an arithmetic number, because the mean of its divisors is an integer number (197779752).

Almost surely, 2^2171660007 is an apocalyptic number.

2171660007 is a deficient number, since it is larger than the sum of its proper divisors (992816025).

2171660007 is a wasteful number, since it uses less digits than its factorization.

2171660007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118718.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 2171660007 is about 46601.0730241268. The cubic root of 2171660007 is about 1294.9826340948.

The spelling of 2171660007 in words is "two billion, one hundred seventy-one million, six hundred sixty thousand, seven".