61669004771 has 16 divisors (see below), whose sum is σ = 71390142720. Its totient is φ = 52716306720.

The previous prime is 61669004717. The next prime is 61669004801. The reversal of 61669004771 is 17740096616.

It is not a de Polignac number, because 61669004771 - 2¹⁴ = 61668988387 is a prime.

It is a super-2 number, since 2×61669004771² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61669004471) 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, 2050760 + ... + 2080613.

It is an arithmetic number, because the mean of its divisors is an integer number (4461883920).

Almost surely, 2^61669004771 is an apocalyptic number.

61669004771 is a deficient number, since it is larger than the sum of its proper divisors (9721137949).

61669004771 is a wasteful number, since it uses less digits than its factorization.

61669004771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4131466.

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 61669004771 in words is "sixty-one billion, six hundred sixty-nine million, four thousand, seven hundred seventy-one".