65621107 has 2 divisors, whose sum is σ = 65621108. Its totient is φ = 65621106.

The previous prime is 65621089. The next prime is 65621123. The reversal of 65621107 is 70112656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65621107 - 2⁷ = 65620979 is a prime.

It is a super-2 number, since 2×65621107² = 8612259367810898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65621407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32810553 + 32810554.

It is an arithmetic number, because the mean of its divisors is an integer number (32810554).

Almost surely, 2^65621107 is an apocalyptic number.

65621107 is a deficient number, since it is larger than the sum of its proper divisors (1).

65621107 is an equidigital number, since it uses as much as digits as its factorization.

65621107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 65621107 is about 8100.6855882697. The cubic root of 65621107 is about 403.3491853767.

The spelling of 65621107 in words is "sixty-five million, six hundred twenty-one thousand, one hundred seven".