61554663 has 12 divisors (see below), whose sum is σ = 89236888. Its totient is φ = 40886640.

The previous prime is 61554613. The next prime is 61554707. The reversal of 61554663 is 36645516.

It is a de Polignac number, because none of the positive numbers 2^k-61554663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61554613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9853 + ... + 14838.

Almost surely, 2^61554663 is an apocalyptic number.

61554663 is a deficient number, since it is larger than the sum of its proper divisors (27682225).

61554663 is a wasteful number, since it uses less digits than its factorization.

61554663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24974 (or 24971 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 61554663 is about 7845.6779821759. The cubic root of 61554663 is about 394.8392509394.

It can be divided in two parts, 615 and 54663, that added together give a triangular number (55278 = T₃₃₂).

The spelling of 61554663 in words is "sixty-one million, five hundred fifty-four thousand, six hundred sixty-three".