34667440721 has 2 divisors, whose sum is σ = 34667440722. Its totient is φ = 34667440720.

The previous prime is 34667440699. The next prime is 34667440729. The reversal of 34667440721 is 12704476643.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25443759121 + 9223681600 = 159511^2 + 96040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34667440721 is a prime.

It is a super-2 number, since 2×34667440721² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (34667440729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17333720360 + 17333720361.

It is an arithmetic number, because the mean of its divisors is an integer number (17333720361).

Almost surely, 2^34667440721 is an apocalyptic number.

It is an amenable number.

34667440721 is a deficient number, since it is larger than the sum of its proper divisors (1).

34667440721 is an equidigital number, since it uses as much as digits as its factorization.

34667440721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 44.

The spelling of 34667440721 in words is "thirty-four billion, six hundred sixty-seven million, four hundred forty thousand, seven hundred twenty-one".