261044667 has 48 divisors (see below), whose sum is σ = 440956800. Its totient is φ = 152137440.

The previous prime is 261044653. The next prime is 261044669. The reversal of 261044667 is 766440162.

It is not a de Polignac number, because 261044667 - 2¹⁴ = 261028283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261044669) 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 47 ways as a sum of consecutive naturals, for example, 85192 + ... + 88202.

It is an arithmetic number, because the mean of its divisors is an integer number (9186600).

Almost surely, 2^261044667 is an apocalyptic number.

261044667 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

261044667 is a deficient number, since it is larger than the sum of its proper divisors (179912133).

261044667 is a wasteful number, since it uses less digits than its factorization.

261044667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3065 (or 3046 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 261044667 is about 16156.8767712080. The cubic root of 261044667 is about 639.1041069991.

The spelling of 261044667 in words is "two hundred sixty-one million, forty-four thousand, six hundred sixty-seven".