61071669 has 6 divisors (see below), whose sum is σ = 88214646. Its totient is φ = 40714440.

The previous prime is 61071623. The next prime is 61071671. The reversal of 61071669 is 96617016.

It can be written as a sum of positive squares in only one way, i.e., 43956900 + 17114769 = 6630^2 + 4137^2 .

It is not a de Polignac number, because 61071669 - 2⁷ = 61071541 is a prime.

It is a super-2 number, since 2×61071669² = 7459497508891122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61071679) 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, 3392862 + ... + 3392879.

It is an arithmetic number, because the mean of its divisors is an integer number (14702441).

Almost surely, 2^61071669 is an apocalyptic number.

It is an amenable number.

61071669 is a deficient number, since it is larger than the sum of its proper divisors (27142977).

61071669 is a wasteful number, since it uses less digits than its factorization.

61071669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6785747 (or 6785744 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 61071669 is about 7814.8364666191. The cubic root of 61071669 is about 393.8038245392.

It can be divided in two parts, 6107 and 1669, that added together give a 5-th power (7776 = 6⁵).

The spelling of 61071669 in words is "sixty-one million, seventy-one thousand, six hundred sixty-nine".