661034753 has 2 divisors, whose sum is σ = 661034754. Its totient is φ = 661034752.

The previous prime is 661034741. The next prime is 661034767. The reversal of 661034753 is 357430166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 657819904 + 3214849 = 25648^2 + 1793^2 .

It is a cyclic number.

It is not a de Polignac number, because 661034753 - 2²² = 656840449 is a prime.

It is equal to p_34337168 and since 661034753 and 34337168 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (661034713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330517376 + 330517377.

It is an arithmetic number, because the mean of its divisors is an integer number (330517377).

Almost surely, 2^661034753 is an apocalyptic number.

It is an amenable number.

661034753 is a deficient number, since it is larger than the sum of its proper divisors (1).

661034753 is an equidigital number, since it uses as much as digits as its factorization.

661034753 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 661034753 is about 25710.5961229996. The cubic root of 661034753 is about 871.1135400071.

The spelling of 661034753 in words is "six hundred sixty-one million, thirty-four thousand, seven hundred fifty-three".