7661403951 has 16 divisors (see below), whose sum is σ = 10490010720. Its totient is φ = 4970810880.

The previous prime is 7661403941. The next prime is 7661404013. The reversal of 7661403951 is 1593041667.

It is not a de Polignac number, because 7661403951 - 2¹⁹ = 7660879663 is a prime.

It is a super-2 number, since 2×7661403951² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7661403901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25840 + ... + 126453.

It is an arithmetic number, because the mean of its divisors is an integer number (655625670).

Almost surely, 2^7661403951 is an apocalyptic number.

7661403951 is a deficient number, since it is larger than the sum of its proper divisors (2828606769).

7661403951 is a wasteful number, since it uses less digits than its factorization.

7661403951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152746.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 7661403951 is about 87529.4461938381. The cubic root of 7661403951 is about 1971.3759488242.

The spelling of 7661403951 in words is "seven billion, six hundred sixty-one million, four hundred three thousand, nine hundred fifty-one".