261966370 has 16 divisors (see below), whose sum is σ = 477509760. Its totient is φ = 103459824.

The previous prime is 261966347. The next prime is 261966373. The reversal of 261966370 is 73669162.

261966370 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (261966373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165012 + ... + 166591.

It is an arithmetic number, because the mean of its divisors is an integer number (29844360).

Almost surely, 2^261966370 is an apocalyptic number.

261966370 is a deficient number, since it is larger than the sum of its proper divisors (215543390).

261966370 is a wasteful number, since it uses less digits than its factorization.

261966370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331689.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 261966370 is about 16185.3751887313. The cubic root of 261966370 is about 639.8554116731.

The spelling of 261966370 in words is "two hundred sixty-one million, nine hundred sixty-six thousand, three hundred seventy".