61667995 has 16 divisors (see below), whose sum is σ = 75881088. Its totient is φ = 48090240.

The previous prime is 61667989. The next prime is 61667999. The reversal of 61667995 is 59976616.

It is not a de Polignac number, because 61667995 - 2³ = 61667987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61667999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92965 + ... + 93625.

It is an arithmetic number, because the mean of its divisors is an integer number (4742568).

Almost surely, 2^61667995 is an apocalyptic number.

61667995 is a deficient number, since it is larger than the sum of its proper divisors (14213093).

61667995 is a wasteful number, since it uses less digits than its factorization.

61667995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110.

The product of its digits is 612360, while the sum is 49.

The square root of 61667995 is about 7852.8972360524. The cubic root of 61667995 is about 395.0814231549.

It can be divided in two parts, 6166 and 7995, that added together give a square (14161 = 119²).

The spelling of 61667995 in words is "sixty-one million, six hundred sixty-seven thousand, nine hundred ninety-five".