61667250 has 32 divisors (see below), whose sum is σ = 153923328. Its totient is φ = 16444400.

The previous prime is 61667237. The next prime is 61667251. The reversal of 61667250 is 5276616.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61667251) 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 15 ways as a sum of consecutive naturals, for example, 40362 + ... + 41861.

It is an arithmetic number, because the mean of its divisors is an integer number (4810104).

Almost surely, 2^61667250 is an apocalyptic number.

61667250 is an abundant number, since it is smaller than the sum of its proper divisors (92256078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61667250 is a wasteful number, since it uses less digits than its factorization.

61667250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82243 (or 82233 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 61667250 is about 7852.8498011868. The cubic root of 61667250 is about 395.0798321792.

The spelling of 61667250 in words is "sixty-one million, six hundred sixty-seven thousand, two hundred fifty".