6166554021 has 6 divisors (see below), whose sum is σ = 8907244710. Its totient is φ = 4111036008.

The previous prime is 6166554013. The next prime is 6166554029. The reversal of 6166554021 is 1204556616.

6166554021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6166554013) and next prime (6166554029).

It can be written as a sum of positive squares in only one way, i.e., 5902848900 + 263705121 = 76830^2 + 16239^2 .

It is not a de Polignac number, because 6166554021 - 2³ = 6166554013 is a prime.

It is a super-2 number, since 2×6166554021² = 76052776987822536882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6166554029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342586326 + ... + 342586343.

It is an arithmetic number, because the mean of its divisors is an integer number (1484540785).

Almost surely, 2^6166554021 is an apocalyptic number.

It is an amenable number.

6166554021 is a deficient number, since it is larger than the sum of its proper divisors (2740690689).

6166554021 is a wasteful number, since it uses less digits than its factorization.

6166554021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685172675 (or 685172672 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 6166554021 is about 78527.4093613179. The cubic root of 6166554021 is about 1833.7811892716.

The spelling of 6166554021 in words is "six billion, one hundred sixty-six million, five hundred fifty-four thousand, twenty-one".