3661220577 has 16 divisors (see below), whose sum is σ = 5657582592. Its totient is φ = 2062658640.

The previous prime is 3661220573. The next prime is 3661220579. The reversal of 3661220577 is 7750221663.

It is not a de Polignac number, because 3661220577 - 2² = 3661220573 is a prime.

It is a super-2 number, since 2×3661220577² = 26809072226896425858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3661220573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1226283 + ... + 1229264.

It is an arithmetic number, because the mean of its divisors is an integer number (353598912).

Almost surely, 2^3661220577 is an apocalyptic number.

It is an amenable number.

3661220577 is a deficient number, since it is larger than the sum of its proper divisors (1996362015).

3661220577 is a wasteful number, since it uses less digits than its factorization.

3661220577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455628.

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 3661220577 is about 60508.0207658456. The cubic root of 3661220577 is about 1541.2578379502.

The spelling of 3661220577 in words is "three billion, six hundred sixty-one million, two hundred twenty thousand, five hundred seventy-seven".