661151002 has 8 divisors (see below), whose sum is σ = 1018530036. Its totient is φ = 321640992.

The previous prime is 661150969. The next prime is 661151003. The reversal of 661151002 is 200151166.

661151002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 661055521 + 95481 = 25711^2 + 309^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (661151003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4467163 + ... + 4467310.

Almost surely, 2^661151002 is an apocalyptic number.

661151002 is a deficient number, since it is larger than the sum of its proper divisors (357379034).

661151002 is a wasteful number, since it uses less digits than its factorization.

661151002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8934512.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 661151002 is about 25712.8567452160. The cubic root of 661151002 is about 871.1646014386.

The spelling of 661151002 in words is "six hundred sixty-one million, one hundred fifty-one thousand, two".