661023702 has 12 divisors (see below), whose sum is σ = 1432218060. Its totient is φ = 220341228.

The previous prime is 661023683. The next prime is 661023707. The reversal of 661023702 is 207320166.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661023707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18361752 + ... + 18361787.

It is an arithmetic number, because the mean of its divisors is an integer number (119351505).

Almost surely, 2^661023702 is an apocalyptic number.

661023702 is an abundant number, since it is smaller than the sum of its proper divisors (771194358).

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

661023702 is a wasteful number, since it uses less digits than its factorization.

661023702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36723547 (or 36723544 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 661023702 is about 25710.3812107094. The cubic root of 661023702 is about 871.1086856332.

Adding to 661023702 its reverse (207320166), we get a palindrome (868343868).

The spelling of 661023702 in words is "six hundred sixty-one million, twenty-three thousand, seven hundred two".