61664467 has 2 divisors, whose sum is σ = 61664468. Its totient is φ = 61664466.

The previous prime is 61664453. The next prime is 61664497. The reversal of 61664467 is 76446616.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61664467 - 2¹⁹ = 61140179 is a prime.

It is not a weakly prime, because it can be changed into another prime (61664417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30832233 + 30832234.

It is an arithmetic number, because the mean of its divisors is an integer number (30832234).

Almost surely, 2^61664467 is an apocalyptic number.

61664467 is a deficient number, since it is larger than the sum of its proper divisors (1).

61664467 is an equidigital number, since it uses as much as digits as its factorization.

61664467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 40.

The square root of 61664467 is about 7852.6726023692. The cubic root of 61664467 is about 395.0738888640.

The spelling of 61664467 in words is "sixty-one million, six hundred sixty-four thousand, four hundred sixty-seven".