61658261 has 8 divisors (see below), whose sum is σ = 70723200. Its totient is φ = 52657488.

The previous prime is 61658257. The next prime is 61658273. The reversal of 61658261 is 16285616.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61658261 - 2² = 61658257 is a prime.

It is a super-2 number, since 2×61658261² = 7603482299088242, 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 (61658231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13961 + ... + 17838.

It is an arithmetic number, because the mean of its divisors is an integer number (8840400).

Almost surely, 2^61658261 is an apocalyptic number.

It is an amenable number.

61658261 is a deficient number, since it is larger than the sum of its proper divisors (9064939).

61658261 is a wasteful number, since it uses less digits than its factorization.

61658261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32083.

The product of its digits is 17280, while the sum is 35.

The square root of 61658261 is about 7852.2774403354. The cubic root of 61658261 is about 395.0606348193.

The spelling of 61658261 in words is "sixty-one million, six hundred fifty-eight thousand, two hundred sixty-one".