629713661 has 16 divisors (see below), whose sum is σ = 655549440. Its totient is φ = 604506240.

The previous prime is 629713649. The next prime is 629713673. The reversal of 629713661 is 166317926.

It is an interprime number because it is at equal distance from previous prime (629713649) and next prime (629713673).

It is a cyclic number.

It is not a de Polignac number, because 629713661 - 2¹⁸ = 629451517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629713681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 671585 + ... + 672521.

It is an arithmetic number, because the mean of its divisors is an integer number (40971840).

Almost surely, 2^629713661 is an apocalyptic number.

It is an amenable number.

629713661 is a deficient number, since it is larger than the sum of its proper divisors (25835779).

629713661 is a wasteful number, since it uses less digits than its factorization.

629713661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244.

The product of its digits is 81648, while the sum is 41.

The square root of 629713661 is about 25094.0961383350. The cubic root of 629713661 is about 857.1319915594.

The spelling of 629713661 in words is "six hundred twenty-nine million, seven hundred thirteen thousand, six hundred sixty-one".