7466860921 has 45 divisors (see below), whose sum is σ = 8980500459. Its totient is φ = 6205001088.

The previous prime is 7466860897. The next prime is 7466860937. The reversal of 7466860921 is 1290686647.

The square root of 7466860921 is 86411.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 2277675625 + 5189185296 = 47725^2 + 72036^2 .

It is not a de Polignac number, because 7466860921 - 2⁹ = 7466860409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7466860421) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 324646116 + ... + 324646138.

Almost surely, 2^7466860921 is an apocalyptic number.

7466860921 is the 86411-st square number.

7466860921 is the 43206-th centered octagonal number.

It is an amenable number.

7466860921 is a deficient number, since it is larger than the sum of its proper divisors (1513639538).

7466860921 is an frugal number, since it uses more digits than its factorization.

7466860921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The cubic root of 7466860921 is about 1954.5465615052.

Multiplying 7466860921 by its sum of digits (49), we get a square (365876185129 = 604877²).

The spelling of 7466860921 in words is "seven billion, four hundred sixty-six million, eight hundred sixty thousand, nine hundred twenty-one".