661006074 has 16 divisors (see below), whose sum is σ = 1324732608. Its totient is φ = 219881952.

The previous prime is 661006069. The next prime is 661006079. The reversal of 661006074 is 470600166.

It is an interprime number because it is at equal distance from previous prime (661006069) and next prime (661006079).

It is not an unprimeable number, because it can be changed into a prime (661006079) 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 7 ways as a sum of consecutive naturals, for example, 110187 + ... + 116030.

It is an arithmetic number, because the mean of its divisors is an integer number (82795788).

Almost surely, 2^661006074 is an apocalyptic number.

661006074 is an abundant number, since it is smaller than the sum of its proper divisors (663726534).

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

661006074 is a wasteful number, since it uses less digits than its factorization.

661006074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226709.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 661006074 is about 25710.0383897030. The cubic root of 661006074 is about 871.1009420680.

The spelling of 661006074 in words is "six hundred sixty-one million, six thousand, seventy-four".