754973661 has 16 divisors (see below), whose sum is σ = 1109278016. Its totient is φ = 453793536.

The previous prime is 754973651. The next prime is 754973671. The reversal of 754973661 is 166379457.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (754973651) and next prime (754973671).

It is not a de Polignac number, because 754973661 - 2¹⁰ = 754972637 is a prime.

It is a super-3 number, since 3×754973661³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 754973661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (754973651) 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, 223420 + ... + 226773.

It is an arithmetic number, because the mean of its divisors is an integer number (69329876).

Almost surely, 2^754973661 is an apocalyptic number.

It is an amenable number.

754973661 is a deficient number, since it is larger than the sum of its proper divisors (354304355).

754973661 is a wasteful number, since it uses less digits than its factorization.

754973661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450252.

The product of its digits is 952560, while the sum is 48.

The square root of 754973661 is about 27476.7840367100. The cubic root of 754973661 is about 910.5642602008.

The spelling of 754973661 in words is "seven hundred fifty-four million, nine hundred seventy-three thousand, six hundred sixty-one".