7661501 has 4 divisors (see below), whose sum is σ = 7731900. Its totient is φ = 7591104.

The previous prime is 7661497. The next prime is 7661531. The reversal of 7661501 is 1051667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1051667 = 173 ⋅6079.

It can be written as a sum of positive squares in 2 ways, for example, as 6895876 + 765625 = 2626^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 7661501 - 2² = 7661497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7661531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35036 + ... + 35253.

It is an arithmetic number, because the mean of its divisors is an integer number (1932975).

Almost surely, 2^7661501 is an apocalyptic number.

It is an amenable number.

7661501 is a deficient number, since it is larger than the sum of its proper divisors (70399).

7661501 is a wasteful number, since it uses less digits than its factorization.

7661501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70398.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 7661501 is about 2767.9416540093. The cubic root of 7661501 is about 197.1384272767.

The spelling of 7661501 in words is "seven million, six hundred sixty-one thousand, five hundred one".