61660162851677 has 16 divisors (see below), whose sum is σ = 66811830059520. Its totient is φ = 56566876398912.

The previous prime is 61660162851653. The next prime is 61660162851713. The reversal of 61660162851677 is 77615826106616.

It is a cyclic number.

It is not a de Polignac number, because 61660162851677 - 2⁸ = 61660162851421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61660362851677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134639399 + ... + 135096587.

It is an arithmetic number, because the mean of its divisors is an integer number (4175739378720).

Almost surely, 2^{61660162851677} is an apocalyptic number.

It is an amenable number.

61660162851677 is a deficient number, since it is larger than the sum of its proper divisors (5151667207843).

61660162851677 is a wasteful number, since it uses less digits than its factorization.

61660162851677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521012.

The product of its (nonzero) digits is 30481920, while the sum is 62.

The spelling of 61660162851677 in words is "sixty-one trillion, six hundred sixty billion, one hundred sixty-two million, eight hundred fifty-one thousand, six hundred seventy-seven".