61736661 has 20 divisors (see below), whose sum is σ = 105399712. Its totient is φ = 35277768.

The previous prime is 61736657. The next prime is 61736663. The reversal of 61736661 is 16663716.

It is not a de Polignac number, because 61736661 - 2² = 61736657 is a prime.

It is a super-2 number, since 2×61736661² = 7622830622857842, 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 (61736663) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 53875 + ... + 55008.

Almost surely, 2^61736661 is an apocalyptic number.

It is an amenable number.

61736661 is a deficient number, since it is larger than the sum of its proper divisors (43663051).

61736661 is a wasteful number, since it uses less digits than its factorization.

61736661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108902 (or 108893 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 61736661 is about 7857.2680366652. The cubic root of 61736661 is about 395.2280070145.

The spelling of 61736661 in words is "sixty-one million, seven hundred thirty-six thousand, six hundred sixty-one".