676161521 has 16 divisors (see below), whose sum is σ = 818402304. Its totient is φ = 546085584.

The previous prime is 676161517. The next prime is 676161533. The reversal of 676161521 is 125161676.

It is a cyclic number.

It is not a de Polignac number, because 676161521 - 2² = 676161517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (676161511) 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, 20555 + ... + 42128.

It is an arithmetic number, because the mean of its divisors is an integer number (51150144).

Almost surely, 2^676161521 is an apocalyptic number.

It is an amenable number.

676161521 is a deficient number, since it is larger than the sum of its proper divisors (142240783).

676161521 is a wasteful number, since it uses less digits than its factorization.

676161521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62780.

The product of its digits is 15120, while the sum is 35.

The square root of 676161521 is about 26003.1059875546. The cubic root of 676161521 is about 877.7081898753.

The spelling of 676161521 in words is "six hundred seventy-six million, one hundred sixty-one thousand, five hundred twenty-one".