7661738 has 24 divisors (see below), whose sum is σ = 13736772. Its totient is φ = 3193344.

The previous prime is 7661723. The next prime is 7661741. The reversal of 7661738 is 8371667.

It can be written as a sum of positive squares in 2 ways, for example, as 7491169 + 170569 = 2737^2 + 413^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2570 + ... + 4682.

Almost surely, 2^7661738 is an apocalyptic number.

7661738 is a deficient number, since it is larger than the sum of its proper divisors (6075034).

7661738 is a wasteful number, since it uses less digits than its factorization.

7661738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166 (or 2159 counting only the distinct ones).

The product of its digits is 42336, while the sum is 38.

The square root of 7661738 is about 2767.9844652743. The cubic root of 7661738 is about 197.1404600083.

The spelling of 7661738 in words is "seven million, six hundred sixty-one thousand, seven hundred thirty-eight".