61665150 has 24 divisors (see below), whose sum is σ = 152929944. Its totient is φ = 16444000.

The previous prime is 61665113. The next prime is 61665167. The reversal of 61665150 is 5156616.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 205401 + ... + 205700.

It is an arithmetic number, because the mean of its divisors is an integer number (6372081).

Almost surely, 2^61665150 is an apocalyptic number.

61665150 is an abundant number, since it is smaller than the sum of its proper divisors (91264794).

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

61665150 is a wasteful number, since it uses less digits than its factorization.

61665150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411116 (or 411111 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 61665150 is about 7852.7160906275. The cubic root of 61665150 is about 395.0753474807.

The spelling of 61665150 in words is "sixty-one million, six hundred sixty-five thousand, one hundred fifty".