61791677 has 8 divisors (see below), whose sum is σ = 62624760. Its totient is φ = 60963840.

The previous prime is 61791673. The next prime is 61791679. The reversal of 61791677 is 77619716.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 498436 + 61293241 = 706^2 + 7829^2 .

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 61791677 - 2² = 61791673 is a prime.

It is a super-2 number, since 2×61791677² = 7636422692944658, 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 (61791671) 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 7 ways as a sum of consecutive naturals, for example, 26099 + ... + 28367.

It is an arithmetic number, because the mean of its divisors is an integer number (7828095).

Almost surely, 2^61791677 is an apocalyptic number.

It is an amenable number.

61791677 is a deficient number, since it is larger than the sum of its proper divisors (833083).

61791677 is a wasteful number, since it uses less digits than its factorization.

61791677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623.

The product of its digits is 111132, while the sum is 44.

The square root of 61791677 is about 7860.7682194554. The cubic root of 61791677 is about 395.3453733030.

The spelling of 61791677 in words is "sixty-one million, seven hundred ninety-one thousand, six hundred seventy-seven".