61669071 has 12 divisors (see below), whose sum is σ = 89178960. Its totient is φ = 41065920.

The previous prime is 61669063. The next prime is 61669093. The reversal of 61669071 is 17096616.

It is not a de Polignac number, because 61669071 - 2³ = 61669063 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61669001) 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 11 ways as a sum of consecutive naturals, for example, 5686 + ... + 12476.

It is an arithmetic number, because the mean of its divisors is an integer number (7431580).

Almost surely, 2^61669071 is an apocalyptic number.

61669071 is a deficient number, since it is larger than the sum of its proper divisors (27509889).

61669071 is a wasteful number, since it uses less digits than its factorization.

61669071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7806 (or 7803 counting only the distinct ones).

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

The square root of 61669071 is about 7852.9657455002. The cubic root of 61669071 is about 395.0837209710.

The spelling of 61669071 in words is "sixty-one million, six hundred sixty-nine thousand, seventy-one".