451016661 has 16 divisors (see below), whose sum is σ = 635673600. Its totient is φ = 283652208.

The previous prime is 451016639. The next prime is 451016669. The reversal of 451016661 is 166610154.

It is not a de Polignac number, because 451016661 - 2¹⁸ = 450754517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451016669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2931 + ... + 30176.

It is an arithmetic number, because the mean of its divisors is an integer number (39729600).

Almost surely, 2^451016661 is an apocalyptic number.

It is an amenable number.

451016661 is a deficient number, since it is larger than the sum of its proper divisors (184656939).

451016661 is a wasteful number, since it uses less digits than its factorization.

451016661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33368.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 451016661 is about 21237.1528458972. The cubic root of 451016661 is about 766.8860923492.

The spelling of 451016661 in words is "four hundred fifty-one million, sixteen thousand, six hundred sixty-one".