61205677 has 4 divisors (see below), whose sum is σ = 65913820. Its totient is φ = 56497536.

The previous prime is 61205663. The next prime is 61205681. The reversal of 61205677 is 77650216.

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 8003241 + 53202436 = 2829^2 + 7294^2 .

It is a cyclic number.

It is not a de Polignac number, because 61205677 - 2⁷ = 61205549 is a prime.

It is a super-2 number, since 2×61205677² = 7492269794056658, 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 (61205647) 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, 2354052 + ... + 2354077.

It is an arithmetic number, because the mean of its divisors is an integer number (16478455).

Almost surely, 2^61205677 is an apocalyptic number.

It is an amenable number.

61205677 is a deficient number, since it is larger than the sum of its proper divisors (4708143).

61205677 is a wasteful number, since it uses less digits than its factorization.

61205677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4708142.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 61205677 is about 7823.4057161827. The cubic root of 61205677 is about 394.0916520015.

The spelling of 61205677 in words is "sixty-one million, two hundred five thousand, six hundred seventy-seven".