6616626061 has 4 divisors (see below), whose sum is σ = 6617394172. Its totient is φ = 6615857952.

The previous prime is 6616626059. The next prime is 6616626073. The reversal of 6616626061 is 1606266166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5929924036 + 686702025 = 77006^2 + 26205^2 .

It is a cyclic number.

It is not a de Polignac number, because 6616626061 - 2¹ = 6616626059 is a prime.

It is a super-2 number, since 2×6616626061² = 87559480862208751442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6616626001) 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, 370986 + ... + 388411.

It is an arithmetic number, because the mean of its divisors is an integer number (1654348543).

Almost surely, 2^6616626061 is an apocalyptic number.

It is an amenable number.

6616626061 is a deficient number, since it is larger than the sum of its proper divisors (768111).

6616626061 is an equidigital number, since it uses as much as digits as its factorization.

6616626061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768110.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 6616626061 is about 81342.6460167113. The cubic root of 6616626061 is about 1877.3512250353.

The spelling of 6616626061 in words is "six billion, six hundred sixteen million, six hundred twenty-six thousand, sixty-one".