661277002 has 16 divisors (see below), whose sum is σ = 1050495552. Its totient is φ = 311541120.

The previous prime is 661276991. The next prime is 661277009. The reversal of 661277002 is 200772166.

It is not an unprimeable number, because it can be changed into a prime (661277009) 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, 104199 + ... + 110362.

It is an arithmetic number, because the mean of its divisors is an integer number (65655972).

Almost surely, 2^661277002 is an apocalyptic number.

661277002 is a deficient number, since it is larger than the sum of its proper divisors (389218550).

661277002 is a wasteful number, since it uses less digits than its factorization.

661277002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214653.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 661277002 is about 25715.3067646489. The cubic root of 661277002 is about 871.2199391588.

The spelling of 661277002 in words is "six hundred sixty-one million, two hundred seventy-seven thousand, two".