67950661 has 2 divisors, whose sum is σ = 67950662. Its totient is φ = 67950660.

The previous prime is 67950637. The next prime is 67950691. The reversal of 67950661 is 16605976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65124900 + 2825761 = 8070^2 + 1681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67950661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67950691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33975330 + 33975331.

It is an arithmetic number, because the mean of its divisors is an integer number (33975331).

Almost surely, 2^67950661 is an apocalyptic number.

It is an amenable number.

67950661 is a deficient number, since it is larger than the sum of its proper divisors (1).

67950661 is an equidigital number, since it uses as much as digits as its factorization.

67950661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 67950661 is about 8243.2190920780. The cubic root of 67950661 is about 408.0667682764.

The spelling of 67950661 in words is "sixty-seven million, nine hundred fifty thousand, six hundred sixty-one".