7661001 has 8 divisors (see below), whose sum is σ = 10658880. Its totient is φ = 4885232.

The previous prime is 7660993. The next prime is 7661029. The reversal of 7661001 is 1001667.

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 7661001 - 2³ = 7660993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7661081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55446 + ... + 55583.

It is an arithmetic number, because the mean of its divisors is an integer number (1332360).

Almost surely, 2^7661001 is an apocalyptic number.

It is an amenable number.

7661001 is a deficient number, since it is larger than the sum of its proper divisors (2997879).

7661001 is a wasteful number, since it uses less digits than its factorization.

7661001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111055.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 7661001 is about 2767.8513327128. The cubic root of 7661001 is about 197.1341386759.

Adding to 7661001 its reverse (1001667), we get a palindrome (8662668).

The spelling of 7661001 in words is "seven million, six hundred sixty-one thousand, one".