61754661 has 6 divisors (see below), whose sum is σ = 89201190. Its totient is φ = 41169768.

The previous prime is 61754653. The next prime is 61754677. The reversal of 61754661 is 16645716.

It can be written as a sum of positive squares in only one way, i.e., 51926436 + 9828225 = 7206^2 + 3135^2 .

It is not a de Polignac number, because 61754661 - 2³ = 61754653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61754681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3430806 + ... + 3430823.

It is an arithmetic number, because the mean of its divisors is an integer number (14866865).

Almost surely, 2^61754661 is an apocalyptic number.

It is an amenable number.

61754661 is a deficient number, since it is larger than the sum of its proper divisors (27446529).

61754661 is a wasteful number, since it uses less digits than its factorization.

61754661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6861635 (or 6861632 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 61754661 is about 7858.4133894826. The cubic root of 61754661 is about 395.2664143008.

It can be divided in two parts, 617 and 54661, that added together give a triangular number (55278 = T₃₃₂).

The spelling of 61754661 in words is "sixty-one million, seven hundred fifty-four thousand, six hundred sixty-one".