661003451102 has 32 divisors (see below), whose sum is σ = 1015753789440. Its totient is φ = 322517341440.

The previous prime is 661003451093. The next prime is 661003451131. The reversal of 661003451102 is 201154300166.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31332974 + ... + 31354062.

It is an arithmetic number, because the mean of its divisors is an integer number (31742305920).

Almost surely, 2^661003451102 is an apocalyptic number.

661003451102 is a deficient number, since it is larger than the sum of its proper divisors (354750338338).

661003451102 is a wasteful number, since it uses less digits than its factorization.

661003451102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23408.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 661003451102 its reverse (201154300166), we get a palindrome (862157751268).

The spelling of 661003451102 in words is "six hundred sixty-one billion, three million, four hundred fifty-one thousand, one hundred two".