6577156066 has 8 divisors (see below), whose sum is σ = 10624636764. Its totient is φ = 3035610480.

The previous prime is 6577156009. The next prime is 6577156067. The reversal of 6577156066 is 6606517756.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6491686041 + 85470025 = 80571^2 + 9245^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6577156067) 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, 126483745 + ... + 126483796.

Almost surely, 2^6577156066 is an apocalyptic number.

6577156066 is a deficient number, since it is larger than the sum of its proper divisors (4047480698).

6577156066 is a wasteful number, since it uses less digits than its factorization.

6577156066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252967556.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The square root of 6577156066 is about 81099.6674839053. The cubic root of 6577156066 is about 1873.6108054006.

The spelling of 6577156066 in words is "six billion, five hundred seventy-seven million, one hundred fifty-six thousand, sixty-six".