1662616749 has 8 divisors (see below), whose sum is σ = 2219325120. Its totient is φ = 1107159776.

The previous prime is 1662616729. The next prime is 1662616751. The reversal of 1662616749 is 9476162661.

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

It is a cyclic number.

It is not a de Polignac number, because 1662616749 - 2⁷ = 1662616621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1662616698 and 1662616707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662616729) 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, 309744 + ... + 315065.

It is an arithmetic number, because the mean of its divisors is an integer number (277415640).

Almost surely, 2^1662616749 is an apocalyptic number.

It is an amenable number.

1662616749 is a deficient number, since it is larger than the sum of its proper divisors (556708371).

1662616749 is an equidigital number, since it uses as much as digits as its factorization.

1662616749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625699.

The product of its digits is 653184, while the sum is 48.

The square root of 1662616749 is about 40775.1977187113. The cubic root of 1662616749 is about 1184.6699809151.

The spelling of 1662616749 in words is "one billion, six hundred sixty-two million, six hundred sixteen thousand, seven hundred forty-nine".