1667266749 has 24 divisors (see below), whose sum is σ = 2454778872. Its totient is φ = 1090252800.

The previous prime is 1667266709. The next prime is 1667266759. The reversal of 1667266749 is 9476627661.

1667266749 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 284765625 + 1382501124 = 16875^2 + 37182^2 .

It is not a de Polignac number, because 1667266749 - 2¹⁹ = 1666742461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1667266695 and 1667266704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667266709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90199 + ... + 107099.

It is an arithmetic number, because the mean of its divisors is an integer number (102282453).

Almost surely, 2^1667266749 is an apocalyptic number.

It is an amenable number.

1667266749 is a deficient number, since it is larger than the sum of its proper divisors (787512123).

1667266749 is a wasteful number, since it uses less digits than its factorization.

1667266749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17117 (or 17114 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The square root of 1667266749 is about 40832.1778625632. The cubic root of 1667266749 is about 1185.7733796779.

The spelling of 1667266749 in words is "one billion, six hundred sixty-seven million, two hundred sixty-six thousand, seven hundred forty-nine".