7661651 has 8 divisors (see below), whose sum is σ = 7832784. Its totient is φ = 7492320.

The previous prime is 7661639. The next prime is 7661663. The reversal of 7661651 is 1561667.

It is an interprime number because it is at equal distance from previous prime (7661639) and next prime (7661663).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7661651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7661671) 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, 11261 + ... + 11921.

It is an arithmetic number, because the mean of its divisors is an integer number (979098).

Almost surely, 2^7661651 is an apocalyptic number.

7661651 is a deficient number, since it is larger than the sum of its proper divisors (171133).

7661651 is a wasteful number, since it uses less digits than its factorization.

7661651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901.

The product of its digits is 7560, while the sum is 32.

The square root of 7661651 is about 2767.9687498236. The cubic root of 7661651 is about 197.1397138205.

It can be divided in two parts, 76616 and 51, that added together give a palindrome (76667).

The spelling of 7661651 in words is "seven million, six hundred sixty-one thousand, six hundred fifty-one".