667661302 has 48 divisors (see below), whose sum is σ = 1288891296. Its totient is φ = 253756800.

The previous prime is 667661249. The next prime is 667661327. The reversal of 667661302 is 203166766.

It is a super-2 number, since 2×667661302² = 891543228376670408, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64648 + ... + 74260.

It is an arithmetic number, because the mean of its divisors is an integer number (26851902).

Almost surely, 2^667661302 is an apocalyptic number.

667661302 is a deficient number, since it is larger than the sum of its proper divisors (621229994).

667661302 is a wasteful number, since it uses less digits than its factorization.

667661302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9685 (or 9674 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 667661302 is about 25839.1428263400. The cubic root of 667661302 is about 874.0146958554.

The spelling of 667661302 in words is "six hundred sixty-seven million, six hundred sixty-one thousand, three hundred two".