951000661 has 4 divisors (see below), whose sum is σ = 1024154572. Its totient is φ = 877846752.

The previous prime is 951000649. The next prime is 951000691. The reversal of 951000661 is 166000159.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40832100 + 910168561 = 6390^2 + 30169^2 .

It is a cyclic number.

It is not a de Polignac number, because 951000661 - 2¹⁵ = 950967893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (951000601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36576936 + ... + 36576961.

It is an arithmetic number, because the mean of its divisors is an integer number (256038643).

Almost surely, 2^951000661 is an apocalyptic number.

951000661 is the 17805-th hex number.

It is an amenable number.

951000661 is a deficient number, since it is larger than the sum of its proper divisors (73153911).

951000661 is a wasteful number, since it uses less digits than its factorization.

951000661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73153910.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 951000661 is about 30838.2986074135. The cubic root of 951000661 is about 983.3926083455.

The spelling of 951000661 in words is "nine hundred fifty-one million, six hundred sixty-one", and thus it is an aban number.